Am I too old to still like Minecraft? And why do people hate it?

So I'm 15yr old girl and I like Minecraft and watch gamers who play it all the time. I just love it, its so fun to watch and build cool stuff. So people at my highschool hate it, like Really hate it. If you mention one little thing about it, it becomes a big class discussion of how much it sucks. When I know some guys and girls who play it that are my age and are really cool. So why do people/teens hate it so much? Is it too kiddish? Please don't be rude when answering

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