I think people should relearn the etiquette of "Don't like, don't read" and "you're not forced to engage"
Fanfic writers are writing for fun and shouldn't be taking the brunt of online hate for sharing what they wrote. People who can't keep themselves from being rude to others won't fix anything. In fact, they'll just complain about the lack of fics in the fandom.
What we need in a community is to uplift one another not tear someone up because they didn't write something that was your perfect cup of tea. You don't even need to comment anything! You have no obligation to do so.
"there's too much x, y and z, why can't people write a?"
Hmm, I don't know, maybe because fanfic writers write what they want? Maybe the people who're complaining should start writing the things you want to see more of? People aren't going to be at your beck and call because you want them too. It's so tiring to see this happen so often in fandom culture.