Why do people seem to not like Girls' Generation/SNSD?

All groups have antifans. SNSD in particular has a lot, especially since pictures of them before debuting came up on the internet. Trust me, a lot, if not all, of their members have had plastic surgery, there are a lot of before-and-after pictures so we know their beauty is not natural. I guess some people think SNSD has a lot of fans because of their pretty looks and a lot of people think they lack the talent. I'm not saying they have no talent, I think they're great entertainers and that's what idols are meant to do, entertain. But maybe people don't like SNSD because some of the groups they like, who also work really hard and have great talent aren't as loved simply because they don't look as "pretty." Just my opinion.