It seems young people love this movie while all parents hate it
I myself am not young anymore, and I'm not a parent... but that's my observation, not sure if it's right.
Young, single people romanticize Chris's journey as a soul-searching life experience, helping people along the way... being one with nature, etc.
Parents (and older folk?) see him as an ungrateful, selfish person bearing a grudge against his parents and who is woefully unprepared for his Alaskan trek.
To summarize, I think Chris should be cut some slack. I mean, didn't we all do stupid, angry things when we were young? He did take it too extreme for some people's liking, but that's up to him.
They say once your son studies philosophy, you've lost him forever.