Fair enough if you don't like Christmas because you're on your own, or your cat died on Christmas Day when you were six, or you follow some other religion, or something. But be honest about it, and don't try to dress up your objection as some sort of moralistic crusade against capitalism. It just makes you look holier-than-thou and stupid.
Buying presents is great. Getting them is even better.
I mean, you've never been to church, so what is your objection? Plus, let's face it... given your age, have you ever known a time when Christmas wasn't commercialised? Could it be that you're just objecting on knee-jerk principle, for the sake of being controversial, and because you're too scared to make yourself appear vulnerable? Might be worth having a think about exactly why you're always being so thoroughly contrary.
Here's another idea: if you don't like that people getting loads of presents for one another at Christmas, as an expression of their love and affection, why don't you try keeping your mouth shut?
Anyway... behold a gallery of video game kids from the olden days, when nobody gave a flying tart about how commercialised Christmas had become.
Black t-shirt boy: "Nintendo is for babies!"
Other boy: "I can't breathe."
Parent (off): "Just try to look grateful for once in your life."
Boy: "I put tape over the dog's eyes and glued its mouth shut."