I don't get it

Heads up:

Me: 7Xsc

Deep stacked.

Villain min raise, I call. Pot is 80.

Flop: 7h2h7d. I check he bets 160 I call. (he's been overbetting/shoving a ton, haven't seen his cards at showdown though)

Turn is Kh I check, he bets 360, I shove he calls pretty quickly. He turns over 3s4h. ?????????

River is a fucking heart.

Yes, I know in the long run I profit off this idiot. But this stuff just pisses me off. I just can't stand this crap. Fine, run your bluff, but what the hell 3-4?? guy doesn't care about money and wins. Such a joke

Edit: I didn't have Pocket 7s sorry