I get this a lot, too, and in both directions - if I really dislike something, people drop in to tell me I'm wrong and should just watch it again! I would like it more the second time! - and I think part of it is some people just really feel their every thought should be shared, or at least, they don't think you're reading them in their space, so they need to come and tell you in yours.

But I'm always like, "Why did you need to come and tell me how much you hated/loved this thing I loved/hated?" It's especially hilarious when it's just something like, "Oh, I find so and so ridiculously attractive!" Clearly that is a squee post! There is no need for someone to come and say, "I don't get it. He's frog-faced." But they do anyway! (it's like the people who tell you a story is okay but it'd be better if it were X pairing. What even is the point of that?)

Anyway, I'm sorry it's happening to you.