Basically the issue I had with it is that they seem to make the site less and less usable as an image host. They used to have (or at least allow) a way to upload images from the command line, but mine stopped working at some point, I couldn't find the page with all my images, they started putting comments on stuff I posted, things like that.

It had turned into a social network when I just wanted a place to send a screenshot to a friend, which I was very dissatisfied about.