As much as I love the good ol' lumberjack, I have to admit that I don't think he was really that good of a parent, but FAAAAAAR better than Barbara the Hutt. Did he love Chris and try to help him though? Well, yeah. He actually did. He was disappointed when Chris wasn't interested in foreign countries (Or anything outside of television for that matter), even criticized him for some of the shit he did, and kept him on a strict allowance. Granted, it wasn't great, but he tried given his age. It honestly seems like the older Bob got, the shittier he got. He was old enough to be a grandparent when he had Chris, and likely didn't have the energy he did when he was younger.
TL;DR: Bob gave it a shot, but failed. Sometimes I like to think that on his death bed, right before he died, Bob had a moment of extreme clarity and realized the error of his ways, his last sight being his morbidly obese wife with a cat crawling on her and his failure of a son, twirling his greasy tranny locks thinking he was a beautiful woman as he gazed at himself in a mirror.