I bought some games that  after a while regret buying because they where not enjoyable and I won't stop getting recommended with similar games. This is bugging me greatly and I wish there was a way to do it?

The recommendation features and the library functions on Itch do lack certain quality of life functions. 

While unbuying a game is not a wise thing, games should at least be able to be hidden. And also it should be possible to ignore games for recommendations. Things like that. Or sorting a collection from old to new.

There is a feedback button to suggest features. If things like these are requested by enough people, they might get implemented someday.