I would like comments for this confession, because I have no idea what to make of it, please.

So, I finished my first year of university, and I absolutely hate the stereotypical people. The fact that it’s normal for kids to be wasting themselves drinking or smoking is completely beyond me, and I don’t understand it in the slightest bit. My girlfriend is in the same year I am and does some of these things and it makes me really uncomfortable, and I don’t know how to go about it.
It is some extreme hatred that makes me think that anyone who does this should be branded, jailed, or executed. I know it’s wrong, but I can’t help but feel this way, do I need help?