My biggest frustration in terms of discovery on itch.io is that, as an adult game creator, i essentially have to choose between visibility and monetization.
I would be interested in uploading my content to a different platform, if that platform did not treat adult content as an afterthought, had robust monetization options (at least on par with itch.io) and was able to offer some plan for how to avoid future financial censorship, along with doing the bare minimum (being run by decent people, having working support, removing malware etc. in a timely fashion) that should be expected from every platform.