There doesnt seem to be a filter system for the games ? 

I have zero interest in horror games and every time I come to this site to take a look it seems every other game is some mental-illness simulator or horror genre game. I cant direct my kids to come here (one of whom makes games) due to the whole site seemingly being a horror / gore / sadist / mental illness game hosting site. 

Is there some way to filter or just delete account and forget ?

See this ongoing topic. And did you try using the tag system to find the games you want?

You should not direct kids here. Itch is not a safe place for kids. And not talking about horror or even nsfw games.

There is malware on the page, because projects are not curated by staff, and it can take over a week to recognise or remove such projects. Unsuspecting kids might download such "games" and get the family computer infected. Playing web games on Itch is safe though.

There is also many minors that use Itch to trash talk and have drama in comment sections.

If you look for "popular" "indie" games, browse Steam.

If you look for actual indie and hobby games, well, horror is popular on Itch, because of all the streamers playing horror games. So the first few pages on Itch will be ridden with horror games naturally.

So the best advice really is, to use a postive tag - if you use the popular sorting.

You could also just visit the front page itch.io

There is https://itch.io/games/new-and-popular/featured and https://itch.io/games/newest/fresh . Those lists are curated and should have a balanced mix of indie games.

There is also the recommendation section. And if your browse interesting tags, you might see a link to public collections that have this game. So those collections might be interesting to you.

But yes, you can filter away "horror" games with a bookmark. But this will not catch psychological-horror or gore or creepy or .... or unlesss the developer has also tagged horror.

I only know how to exclude a tag in this manner. If you want a UI equivalent, you could post a feature request in the Ideas & Feedback section of the forums.