I guess it depends on your view what you consider a better option - getting better search results for yourself or skewing ratings for everyone else 
Iām not saying this feature request is bad. I probably would use it too. Iām saying this suggested solution is bad. I mean, how many these not wanted items are there on a single search results page? 3? 5? Is is it that difficult just to skip them? If there are a lot of such items, that sounds more like a bad filtering 
Of course I donāt know your case - maybe you donāt like quite a lot of different criteria movies or shows - so I might be wrong, but without more personal taste info thereās not much anyone can suggest at the moment 