Why do people hate Seinfeld?

I really like Seinfeld. It makes me laugh. I can watch every episode 4 times (I think I have) and still laugh. Obviously some people do like it. It's been on forever. It's like Andy Griffith. I think my grandchildren will watch Seinfeld. Just so you know, I don't have any grandchildren yet. That's how long I think Seinfeld will be on. My children don't like Seinfeld. Years ago when I would watch Seinfeld, every time my children would catch me watching it, they would say, "Why do you watch that? It's not even funny!"  I think it is funny. My daughter even mimics him. I just don't understand it.