Oh, I do that too (the writing to improve my English). I assume your native language has phrases that ommit the pronouns a lot, so things like "I" and "you" are hard. The back translating on a web page is a simple trick to use. If your text does not translate back well, the translator did not understand the meaning.
The sub-forum is misleadingly named: "Support", but the first sentence in the header should clarify it. "Get help from the itch.io community". For real issues they want you to send a mail to actual support. So here in the message boards it is mostly discussion among users, which might or might not include solutions.
And do not worry, it is less cultural difference and more of: Itch being Itch. Some things are just different, as it is an indie site for indie games. And this includes the message board. Ever heard of a message board that has no spoiler functionality in comments? A message board about games. A topic, where spoilers are a concept.
All publishers on this site are also users. At least there is no difference between the accounts. You are a publisher if you have uploaded a project. There are also no direct or private messages on Itch. But they still have a follower system that reminds people of actual social media. And when you write a review for a game, it is not public as it would be public on Steam. It is not attached to the game. The publisher sees it, and maybe followers of the review writer. And it appears in the global feed of reviews for a short time. Very peculiar.
They have a button for feature requests. It is hidden if your browser window has too few width pixels. There is a button on the left side in your settings, called feedback. If you do not see the button, decrease zoom level of your browser. Requesting features in message board is therefore not the channel to Itch. It might get noticed and there might be discussion. So my theory about the the exclusion feature is, that while some people discuss it on the message board, actually not that many people did request it by the feedback button. When it came up in message board some 6 years ago, the site founder quickly made an "inofficial" feature for a single tag exlusion. But this was not expanded. Probably because it would be very hard to do multiple tag exclusion.
And in case you missed it:
https://itch.io/game-assets?exclude=tg.ai-generated
This will hide all assets that are tagged ai-generated. But you will still need to read the description, because selecting this particular tag is not enforced.
(The feature is inofficial, because it has no button on the website. You need to add it to the url. If you do that a lot, use a bookmark.)
Anyways, as I hinted in another reply here: this feature will be of little use to you. There are 60000 assets on Itch. Only 300 have that ai tag.