He sounds like an egoistic, entitled prick in my opinion. You definitely didn't overreact, it's completely inappropriate insult your SO's intelligence (even if you may be more knowledgable in any given area). I had sort of a similar experience, but instead I was more ridiculed and insulted about my street/life smarts. My ex for some reason unknown to man thought that he was the pro at life and making money and starting a business (which I think he has made little progress on in 3+ years). Whenever I'd give my two cents he'd always pull the, "Do you even know what you're talking about?" or "No, that's stupid and wrong, I don't need your opinion because I'm older and have more life experience than you." (side note:he was 4 years older than me). It was always extremely humiliating and belittling and I hated it, but put up with it for along time until I finally snapped when he laughed at me for my "ignorance and closemindedness" when he thought that it would be a good idea to spend +$10k on one of those bogus six-week programs that would teach you everything about business and get you investors blah blah and I said that was a horrible idea considering that he didn't have a lot of money and that he would have to borrow from his parents (who still let him live with them and feed him).

Long story short, and sorry for the length this kind of turned into a rant, you want a partner that compliments your intelligence and respects you. I'm now dating this amazing guy and we have VERY different skill/knowledge sets (I'm in biology/med/biotech and he's computer science), and we actually teach each other things from our studies and often make jokes about how the other is so much more intelligent than the other in "X" topic. Your boyfriend is an asshole, give him the axe :) good luck!