Freakmasta

I'm still having trouble so I posted what I'm doing right now. I am trying to do the following: Challenge 20 5AAA>214A>5C>5B>2B>236D (B)>236236B If you can find something specific that I'm doing wrong, please let me know. But as you can see, I'm mostly struggling with the 5C and 5B area. https://www.youtube.com/watch?v=urRvHw4h4pU&feature=youtu.be

I'm still struggling on the 5AAA>214A>5C>5B... but on the 5B part. I have like a 20% success rate on the 5B. 5C is fine now but 5B is killing me to the point where my fingers are cramping up. I will try the SB bombs to make it easier but I would at least get the success rate above 50%. I don't think I'm holding it since I don't see her charging. I try to mash the 5B but still no luck. Is the game thinking I'm trying to hold when I mash?

When doing the BnB (5AAA>214A>5C>5B...), I keep whiffing the 5B. What's the case for this? Am I not doing it fast enough?