Right now you can only tell Spotify you don't like an artist through personalized playlists like Release Radar

Spotify first tried introducing this feature back in 2017 but decided against it “after serious consideration.” But the company looks like it’s reversing its decision. The company is currently testing this “don’t play this artist” feature in its newest iOS app. It’ll let you block an entire artist from appearing in your library, playlist, chart list, or even radio stations on your Spotify account. So, if you’d rather not hear from an artist you don’t like or are protesting against. You’ll soon be able to block them out, hopefully on a lot of platforms Spotify is available on.

Source: The Verge