That hundred years of Aang doesn't really count because he slept through it all. Jack experienced every second of his fifty years, growing and aging mentally if not physically, slowly becoming crushed and cynical of his odds.

To be honest there is reason to hate, but it's more to do with the fact that it's kind of rushed. I mean, it's been 3 episodes…? Aang and Katara were there there basically since they met.