I enjoyed that YouTube vid, SpaceUnicorn, but I'm not certain that a similar one couldn't be made of my favorite player's worst moments, too.
There is a funny pair of videos on YouTube from a long while back maybe from RG where a youthful Djoko speaks about how he was controlling a match, against Rafa, although he was forced to withdraw because he was injured, or it was too hot, or he couldn't breathe, or he had a sore throat or whAtever the ailment of the day was, and then a matching video of Rafa being told what Djoko had said. Rafa is clearly puzzled, as though he doesn't understand the English, and then incredulous that ND would have said such a thing about such a match.
Sorry. That took a long time to say not very much. But it IS funny....
As for reasons not to like Djoko, how much time do you have? I have many reasons, myself. And many of them go way back. I've been watching tennis for a long time.
Plenty of "fans" seem to think tennis only happens during slams, and they like to follow someone who wins a lot.