Game 1: I just want to get this out of the way right now... It doesn't look like you know the Lambda vs Rachel MU very well, however you know the someonewhodied vs Frostbite bob MU quite well if that made any sense. What I'm trying to say is that you almost knew what he was going to do before he even did it... which is not necessarily a bad thing but you want to know the ins and outs of Rachel and how to counter her, not how to counter frostbite bobs Rachel.
Anyways on to more important things... your offensive capabilities seemed quite good, but your defence seemed quite weak. As for offence there were a few dropped combos but not really anything crazy. You know how to properly space your D moves and your C moves and you did optimal combos. The major thing that I wanted to point out is that you should try and zone Rachel a little more. This isn't a terribly difficult MU to play unless you so choose to play it poorly, which, in these videos, you didn't really play it all to well. Rachel doesn't want to spend her wind meter getting in, that severely hurts her, but she has to in order to get in or its a Lambda vs Ragna case in which its lol worthy. What I'm getting at is to not play into her hand, lead that match like your supposed to be. OH AND THIS IS IMPORTANT AND I'M BOLDING IT FOR A REASON... don't throw out random act parsers, once in awhile its ok because you might catch them sleeping, but damn it was like every 4th or 5th attack was some sort of act parser. Oh I forgot to mention your 236D Oki was kind of bad but that's quick fix, its not horrible, but it does need a little bit of work.
Now onto defence! It was... how to put it... poor. You also seemed kind of panicky on defence throughout the match, but when you were in control everything kind of came naturally for you. Now I know we all main Lambda here so defence might not be our greatest strength which I am well aware of, but we can't go and disregard it. Almost every combo Bob got on you started with a counter hit and that's just asking for a huge damaging combo and you in the corner. Oh and these were your three options of escape that I noticed, and quite frankly, none of them really involved blocking for a set period of time... Your options were 4B, 5C (occasionally 3C), and CA.Now 4B mashing is a realllllly bad habit to get into, I make fun of Pisces for doing it all the time, please don't be Pisces. 5C is just straight up not a good option, I mean really 5C is mainly used for combos and that's about it. 5C can be used in other areas but it really limits your options. CA is fine and all but your spending 50 heat on a "I might get out of the corner, I hope he doesn't read me" kind of situation. Just learn Rachel's moves , block strings, what she can and can't do and react accordingly, don't mash it out :P
This is a little story on how I got better at defence. I grinded out 25-30 Games against Leonil Requiem‎, and I got my ass handed to me. I asked him for advise after the games and he said learn to block. Most people would take this as an insult and move on but I took it to heart. I learned to block as my main focus, nothing else mattered to me at that point and for about 2-3 months I just practiced my defence. You wouldn't believe how much better you get as a player when you learn both sides of offence and defence.
Overall I thought you did really well, just the defence kind of messed you up through the match.
TL;DR - Offence good, defence bad, learn MU, blocking is nice.
Game 2: Kind of hard to critique due to the fact that to tore him limb from limb. Ummmm I guess there were a few random act parsers but I guess its ok because the Lambda mirror is fucking retarded. I guess that's really all there was to it because a Lambda mirror is the first to lock the other one first, and you did a good job shutting him down. The random act parsers can backfire on you super hard in the mirror MU. But yeah lol game 2:eng101:
Game 3: Okay this game made me sad and laugh at the same time. I laughed at how hard he spammed sledge, I cried at how you tried to punish it. 236B the answer to a spamming Tager? NO!!! 5D > 236C his face if he sledge B's. Make him rue the day he ever did a random sledge vs you. I LOVE fighting bad Tager's online because that's all they do is spam sledge. Destroy his face and make him question how he plays that MU. I'm giving this its own paragraph because it is literally that important.
Now onto offence:yaaay:. Overall not half bad, you could brush up on your zoning and some of your options like a point blank 5D is questionable... but that's about it. 2D > 6D if he super jumps is really strong vs Tager and you can follow that up with a 236DC and spike chaser if you so choose just be careful of spark bolt. If he does a regular jump just 6D his face or a 6A if he tries to go for anything fancy. This should not be a hard MU at all... its literally a flow chart you just need to know what to do and when.
As for defence... it was lacking again. There was a time when he did the same, unsafe block strong for about 3 times in a row and you stood there in a panic with your barrier up. That is bad, Tager does not have much for block string, learn what he can and can't do and punish him for going for unsafe things like 6B and 6C. You also teched immediately in the air when he finished him combo, a stronger Tager would have caught onto this and punished you with tech traps and stupid stuff like that. You have to be very careful against Tager, because he might not have good block strings, and he might be bad character overall... but one wrong move and that could cost you the round.
TL;DR - 5D > 236C is godlike, zone him better, don't panic.
Game 4: Honestly this game was really sloppy. The first three games were fine in the sense that you didn't play poorly, you could just improve on things is all. But this game was rough. The whole match summarized was for both of you... I dropped my combo, I didn't block, I LIKE DP:yaaay:... . That aside I want to point something out that might seem crazy, even to you. I think we can all agree that spike chaser is a pretty good move, even more so against Ragna. You did it 3 times that whole match... 3 times. I should be seeing that move 3 times a round let alone 3 times a match, and one of them was an accident, you intended to do TK crescent. I also counted 3 times where he did a block strong on you, ended it early for whatever reason, and your retaliation, your GTFO of my face move was... 5C. 5C? Really? I don't even want to go to the frame data to see how long of a start up that has id probably cry a little to myself. 5C and air 5C were the story of round 1, you got creamed in round 1 because you threw out some random ass attack that doesn't belong in that position.
Now onto things you did well in. I was going to count how many times he did inferno divider, and I know its a good attack, but seriously what the hell was he thinking? Thankfully you caught onto his foolishness and you won round 2 and 3 because of it. He was a super, hardcore rush down Ragna that gave 0 fucks in this match, so punish him for doing so. I saw when you went for a barrier block on him in one of the rounds and it still hit you, that made me sad because you had good intentions that were snatched away from you. Overall what you did good is that you were thinking! You saw his play style and you adapted to what he was doing and reacted accordingly! That in itself is a very good lesson and you clearly demonstrated here that you aren't some herp derp online player, you think and learn to what your opponent is doing and that is very important.
TL;DR - Kinda sloppy game play wise, but you adapted well and won because of it.
Anyways that's all for now, if you have any specific questions feel free to ask, I'll be more than happy to help you out on specific situations in the video.