If you don't like someone or something, just DON'T say it! OK, we already get the point, so must you keep on saying it? It looks like you just want to get attention. If you have something bad to say, keep it to yourself, because it hurts other people's feelings.
So one piece of advice:
Keep your mouth shut and keep to yourself if you want to say bad things, because in the end, YOU are the one who will be hated.