First half of the episode was really rough. There was some cool movement in Shigaraki vs Redestro, but the art was very melty. I guess this was just the production falling apart a bit considering that they had 8 animation supervisors on this episode(you can have perfectly good looking episodes of anime with just 1 or 2 animation supervisors).
I've also apparently heard some cuts skipped from layouts to douga, which is an insane leap. This means they pretty much skipped the genga correction process.
The flashback was actually really good. Happy with how they executed it.