What happened to you in order for you to be so negative?
Of course people can like different things, and especially when it comes to something like a manga, book, art, etc. It very much comes down to individual taste.
If you.sont like something, leave it be and find something you do like. And try to remember it's ok to have different opinions, you don't have start feeling negative because of that, it's all kinda of unhealthy.