I've been trying to fine-tune my recommendation list by clicking on "not interested" and "don't recommend channel". "Not interested" option just removes a video and doesn't adjust anything according to what I observed. "Don't recommend channel" does a thing but after several months the channel again pops out on the recommendation list. Especially annoying reaction videos which I never watched and will never do.

Also when I try to refresh the front page I still see the same videos all over again in different order.