Pandora's suggestion algorithm is much better than Spotify's. What you describe is what I used to do with Pandora. I migrated to Spotify several years ago.

Spotify generates some decent genre based playlists based on my listening history. Not as good as Pandora was.

Lately with the pandemic, I've created a super-chill, ambient play list (I started with Moby's Long Ambients and expanded from there) to relax before bedtime. This has been really helpful for unwinding in these stressful times.

However, an unintended consequence is that Spotify now thinks I listen to soothing ambient more than 50% of the time. My year in music is all ambient and my suggested play lists are all wishy-washy now. Apparently there is no "ignore this playlist when tracking usage." You can only manually disable tracking under "Settings > Social" and it times out after every session.