Because this is a fairly slow subforum and based on your performance last Friday (March 14), I'll semi-necro this to give more information to see if anyone else can help with this since I didn't know this earlier.
Your problems are pretty much what they've said, and despite the OP's claims I have blatantly said them multiple times. We've been on this same issue since January.
I'm bad on execution due to grad school things but I'm keeping up with the information and giving him full feedback.
Very soon after the OP, I even gave him a full detailed word doc of what he did wrong, more details about Mu, and several videos on Noel and what you all also said.
I main Mu, but a lot of the following holds true with all 3 games I played you in or even when I play another character:
You have poor blocking and neutral & you do very dumb stuff
I'm not even doing standard blockstrings/mixups because ADHD gets in the way so you're getting hit by regular mid attacks like 5B/5C all the time.
You run in headfirst for everything, you really need to think about how to approach/retreat and know the range of your opponent. 5C counter hit round openings are a common sight. You've ran into *charged* Sword of Decimation many times straight on.
You are very predictable with Optic Barrel, you consistently back airdash to the corner for it to try to zone me. I don't know if that is a carry over from Marvel.
You yourself said that you don't know what to do for oki. Running fullscreen to be right in my face just to throw all the time is not a good strategy. You need to mix in your throws in pressure.
You go for grabs (ground and air) entirely too much when you're not even in range.
You go for the wrong Noel drive on block or whiff and get punished for it hard.
You have tunnel vision with the laser fortress (which I'm doing super bad). (The salt that he's talking about)
What you need to do is stop playing me right now because I've memorized you too much. Play more. Play against other people/characters. (I also need to do that)