I don't really think weebs are to blame here, but more what they call tourists nowadays.
Maybe the landscape has fundamentally changed since I was last on 4chan (years and years ago), but I still vividly remember all the waifu wars, endless debates over which anime girl was the best and all the explosions of rage as "worst" girl won. There was always this understanding that anime, like most nerdy stuff, was inherently cringe and pandering to a specific demographic, so you either embrace that aspect of it, or gave up on the whole medium altogether.
I assume the people making this slop are people that watched mainstream stuff like Naruto and One Piece on and off and try to coopt weebery for their own ends, and the subhumans that lose their shit any time they are reminded anime features tits and ass.
Either way, I hate this trend of people only consuming entertainment to laugh at it. What kind of hollow husk of a human do you have to be to waste your life doing something you don't enjoy so you can go on the internet and attempt to impress random strangers with how "mature" and "sophisticated" you are for disdaining trash meant for peasants?
This is actually one of the nastiest traits of liberals, the need to barge into places where they are neither wanted nor welcome. My thought process when encountering something I don't care for, or dislike, is to leave it well-enough alone, but not liberals, they are compelled to screech at people that their hobby is racist/sexist/bigoted etc. and that it should be changed so liberals can feel better about themselves.