If you like a manga and he doesn't, just ignore him and keep on liking it. He is the one who is wasting his time reading something he doesn't like. People that seek out things that they don't like so they can complain are pretty miserable people not worth your time. I have had series I didn't like, and guess what? I stopped reading and commenting on em. It ain't hard. If he is still here it is because he wants attention.