I actually think one reason people don't like depressed people, is that depressed people often come across as selfish.
And depression is a selfish illness, I know most people with it have terrible self esteem, but still, they always are thinking about themselves, how bad their lives are.
And of course, it's always annoying, seeing people with depression slacking and doing nothing all because of what most people see as 'a bad mood'. Most people don't understand mental illnesses AT ALL. They can't understand that depression is an illness, not just someone who's a bit of a moody person. Mental illness is still ridiculed, because people don't understand it. I know here in England there's definitely still a 'stiff upper-lip' attitude to life, you don't let things get to you and if they do, you certainly don't let it show.
I don't condone people hating on depressives, but I can understand why they do. I had major depression for a few years, and some of my relatives had the attitude that I was making it up, of course I hated them at the time, but now I'm out of it all, I can totally see where they were coming from. I wasn't a nice person at the time, I was totally selfish, and a huge strain on my family. All because of, what to them, seemed like teenage blues.