I'm sorry your father is taking YOUR DECISION in YOUR LIFE so badly. Doing something for yourself and that was your decision was the right decision.
I know the feeling of being called stupid, my parents and family honestly didn't believe I'd graduate from high school, let alone make it into university. You're not stupid, the clear fact that you had made it into university shows that you're not.
He shouldn't be invading your personal space, regardless of whether or not you live under (what I assume your father believes it to be) "his" roof.
I feel like a vistor in my family's home, to the point where even calling it "my home" makes me uncomfortable. Before I moved into residence this September I always felt like an outsider, and did put up with the comments about my lack of motivation, brains and overall talent (as compared to my gifted younger sisters). I feel like a stranger in my family's home, and no, it isn't a very pleasant feeling. What you have to do is either resolve yourself to feeling like this or find some way to work it out. Or move out, if you've got any sort of oppurtunity. Its a big decision, but it was a good one in my case. (Sorry, I don't mean to sound bossy. I'm just trying to help. Please feel free to ignore me if my advice is unwanted.

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I feel for you, and you always have a home here at PC, if thats any consolation.
*HUGS*