The character of Ross NOT the actor who played him. I know it was only a TV show but there are some pretty interesting points here.
And all put together in one place makes me realise Ross was pretty abusive.
www.redonline.co.uk/reviews/what-to-watch-tonight/this-fan-theory-about-ross-and-ben-from-friends-is-really-sad
One point thats been left off that list is that he was the Golden Child growing up. (anyone who has watched the show will remember his parents his mum especially favouring him over Monica. This may have fostered a sense of entitlement.
He was also controlling or tried to be when he found out about Monicas relationship with Chandler.