You know I think, based on what I've read them say, they dislike him a lot more than we did. We didn't like his attitude and the whole Capello thing with DP, but by and large Zlatan was a professional with us. Not so with Inter
We've seen this before, of course, but basically Zlatan has a lot more freedom to "be himself", and that's not a good thing in his case. As the season drew to a close he had them over the barrel of a gun because of how important he is to the team, and they had no leverage to stop him from demanding a sick contract or a transfer.
Even before that though a lot of people were pissed with his general attitude which revolves around him and not the club.