No one called Baba Ji evil..
As yet, I've seen three traits of him..
1) At times he's tharki: Some girls understand, some don't understand; some enjoy it, some ignore; boys make jokes.. but most of the viewers don't like quality in the person of his age and status..
2) All the times he's dhongi: He make such big and false claims that a listener can't stop laughing.. this quality is actually making him interesting for the viewers..
3) At times he's irritating: We as viewers can't understand but contestants who live with him experiencing that when you sit wth someone and start talking continuously even if the other person is telling you clearly that he or she does not want to talk to you at that time it becomes irritating and most probably get a reaction too.. and that's why he's being disrespected by many, many times.. it happened with both celebs and commoners so it can't be wrong.. perhaps its his nature of perhaps its his game plan..