Maybe social media makes it more normal for people to whinge about things they don't like?
I try to focus on things I do like rather than waste time complaining about stuff that doesn't get my interest (or that I have tried and disliked).
It just seems like a waste of time to tell strangers how you hate/dislike X or Y or Z. What's the point really, unless someone is asking directly? It's egotistical. I dislike Halo strongly, but I don't waste my time or other people's time repeatedly stating something that helps nobody and accomplishes nothing of value.