If a proper filtering and exclusion system is not going to be implemented, then maybe a compromise can be made. There is a deluge of visual novels on the platform, more than enough to warrant its own category similar to how "Games", "Game Assets", and "Comics" can all be separately searched and viewed. This might help reduce the chokehold they have over the itch.io library and reduce the site algorithm's ability to show you nothing but visual novels because you made the mistake of clicking on five of them without realizing what they were.
Of course, my main preference would be for an actual tag-filtering system that isn't the minuscule single exclusion that users have to manually add to the url. But given how many suggestions have been made across multiple years with little to no feedback whatsoever, it seems that site ownership has no interest in that.