Back when I was in the 5th grade, I REALLY wanted a gigantic Squidward plush. When I didn't get it, I hated Christmas.
The next year, I was still upset about that, and I was depressed a little during school, so I still hate Christmas.
The next year, school was better, and, I was positive about Christmas for my brothers, and I started to understand more. (Plus I made the best music video, EVER!

)
It's just that, there are some years where you are just totally depressed, you tend to hate Christmas.
Then there are some years when you are a happy person, and it just seems good.
I respect what everyone thinks, because not all Christmases are celebrated the same. They are different. They are all celebrated different.
Even though Christmas has gifts, we celebrate religious miracles, see some nice Christmas stuff on TV, wait 'til midnight for Santa, or Saint Nick, or whatever is your international guy that brings pressies with magic, sleep on the holiday break, yadda yadda yadda, Christmas has it's downsides. So, respect it if someone has their downsides with Christmas.
And hopefully, you'll just have at least ONE year where you were as happy as me this year, and enjoy your Christmas.