I want Spotify to fix Discover Weekly. At some point Spotify learned I like Chinese and Korean songs, they started to add Thai songs. I don't listen to Thai and I don't understand Thai. I don't know how to make Spotify unlearn and remove Thai from Discover Weekly now. Ever since, I stopped using the Discover Weekly feature because I get 3-4 songs in languages I don't understand and there isn't an easy way to make Spotify realize I dislike a particular kind of song.
If there isn't a "I do not like this" feature for a machine learning feature, that UX isn't good. Other users have raise this concerns too (google it).