Are we talking about the same Spotify? Because the only reference I found to removing songs from my recommendations is a thread from 2020 that says it is not possible.
I set up the browser session we use as a TV with profiles entirely to prevent any more of my spouse's yoga videos from leaking into my carefully curated feed of machine shop footage and construction videos.
https://community.spotify.com/t5/Accounts/How-do-I-delete-my...