I kind of feel sorry for him. I think if the house this series had been more fun then the likes of Jack, Sam & Simon would have been seen in a different light.
I understand Jack can be bitchy & grumpy but no more than anyone else in that house.
I find him quite immature but that's about it.
Yes, he should have taken the car but at that time he was perceived as the favourite to win, so it was sensible to stay in there.
I just don't get why he is hated so much