okay im only on season 4 but why does so much bad stuff keep happening to nathan? it seems like other than haley his life is crap! please comment

Because Mark writes it like that.
Well not everything is crap.
Other than Haley, he also has Jamie.
And he has great friends and in in s6, he finally makes it to the NBA!
His life wasn't always easy but in the end, he became happier and happier.