Had a similar thing with stupid videos of people reviewing airline first class, I found the solution for when it does that, you have to go into history and find

Had a similar thing with stupid videos of people reviewing airline first class, I found the solution for when it does that, you have to go into history and find the video that caused it and remove it from your history and any others you accidentally clicked on since, solved it most times. Hate how persistent it is with some of the lowest forms of content, also no idea why I can't just type in a channel name and block that channel from ever appearing, I can only do it when they get recommended.