I didn't own much on itch, but recently I bought the bundle for racial justice and I've found that it's really hard to look for the things I'm interested in, I'd like to at least be able filter results by tag in the bundle or my library, but I haven't found a way to do that. In bundles you only seem to be able to filter items by name and my library doesn't seem to have any way to filter things other than collections.
I also can't go to browse and only show games in my library.