If a few people think you are a w*nker, then is that bullying? I don't think VK was a nerd with glasses, he'd probably quite easily fight his own corner, and Madders and Barnes would probably p*ss themselves if he had squared up to them. I think it probably has more to do with the culture of the club, which is why he wanted out.
I for one would lay the blame on Rodgers, it was his job to sort these problems out and create squad harmony, but we know he was more interested in himself and what payoff he could get.