I just checked shorts on my phone and they have like and dislike buttons. Does it still show you that stuff if you press dislike? In the top right they have a … with options for “not interested” and “block channel” which should fully remove it if it’s the same channel being recommended. I don’t have any of that stuff on my feed probably because I blocked them the first time I saw them. If you didn’t know those options existed then they clearly have a UI problem.