I think the problem is that there's really no way to keep an open discussion like that gated to just people who have developed good critical analysis skills. Everyone's allowed to have an opinion, which is nice, in some ways, but does mean the onus of working out what value to take from what people say is kind of on the reader.
I think in the right situation, it's very helpful to look at things that don't work, and to analyse why they don't work well, or to look at why some people don't like some tropes to understand another person's point of view.
But if you're dealing with people who aren't trained or experienced in critical thinking, any discussion can immediately spiral into either: "Oh no! People don't like this trope, so I should never put it in my work!" or "How DARE you dislike this thing I like!" And people who have no ability to separate things that have personal appeal, or that they personally don't enjoy, from things that are actually offensive, confusing, harmful or go against established good practice, have a tendency to miss the fact that not everyone is like that; some people can criticise a thing they like, or can criticise flaws in something while still acknowledging that it has value in other areas, or may be particularly meaningful to some people to an extent that the flaws don't matter.
It's a difficult problem, because it's neither entirely the fault of people discussing things they dislike, or completely the fault of people who don't like other people doing that being too sensitive. It can be either or it can be both. You often get people who just don't like something phrasing it like "DON'T put this in your story" instead of "I don't like stories with this in." but on the other side you often get people who read "I don't like stories with this in" as if it meant "nobody should ever make stories with this in and if you did, you're a bad person."
And on Tapas, the effect is compounded because people can be kind of.... ranked numerically here, and make actual money, and that leads to a lot of bitterness and envy. People develop a hatred of certain tropes or genres they feel are "cheating" by having an easier time getting readers, say they hate those tropes, and then upset people who make comics and novels around those things and feel like they're being called hacks. Worse, they're often tropes around gender and sexuality, so there's this unfortunate extra element in there. Sometimes people pile in a lot of dogwhistles and then are like "why u so offended, it's just my opinion, bro (tee hee)." framing another person's actually reasonable anger at them as an oversensitive overreaction, and relying on people with poorer critical understanding, or limited English or where the discourse is on issues like race, gender and sexuality in English-speaking countries, to feign innocence.
Basically... it's a mess, and with "things I hate" type discussions, I find they're often not that useful on an open platform where you don't have the benefit of knowing the people who are talking or whether they really have any idea what they're talking about and it's hard to flag blatant trolls, and I tend to get more out of them when they're in a space where I can see a more measured conversation around the thing being discussed by people I trust to have an interesting and nuanced view.