I've watched mostly all the main stream ones AOT, JJK, FXF, HXH, CSM, One Punchman, Mob Psycho 100, One Piece (35% of it lol) and I'm watching Blue Lock right now
Not brainrot but its just a cliche genre, like isekai.
I didnt read the webtom, but this type the genre is allways smth like that.
Op char, op char destroy everyone, appears a stronger dude (If the anime is good, mc lose), mc gets stronger mid fight and solo the dude no diff.
Repeat until mc turns in a literal god.