my current theory is that the reason we're seeing a big surge in like, anime and anime adjacent stuiff with plots that are like "what if the idol girl/musician/vtuber/whatever was a kinda dorky loser or a weird problematic girl or she sucked" or such is due to the recent vtuber explosion
vtubers are, to the shitty managment people wanting to make infinite money, kinda the best parts of like... online vocaloid "obsession with 2d girls" kinda fandom and idol fandom combined. you get the power of having an actual person behind it but they aren't "real", you can make up a character and do animations and do anime/video game shit with them
however, the problem is the dominant form of vtuber entertainment is... streaming video games, and that requires endless improv and a genuine appreciation for videogames. so there HAS to be a little bit of the real person there. you can't JUST have the image, the fantasy, the reality that there's a real person behind it leaking through is part of why people like it, and if you try to remove that you just sterilize it into something nobody wants to watch
so now we have a wave of stuff that is engaging with that desire, for just a litttttle bit of real weirdo energy in the fantasy anime girl