If You read the manga you should know by now that Deku is gonna fight brainwashing dude. So I just gotta ask: who do you think is gonna win when that fight goes down. I think deku might loose... just so brainwash guy cvan shine or something.
This is very possible. Otherwise, I don't see Deku losing to Shinso seeing as he has experienced the brainwashing process before.I think that Deku will intentionally get caught by that guy's voice to see what happens with his quirk.