I played with a guy just like you. He would lose a big pot and make it personal and would spew more chips to get back at that guy.......usually someone else picks up or makes a big hand and stacks him.....guy lost over $1500.....AT A 1-2 GAME
That said, there is no reason to ever 3-bet to 30% of the preflop raiser effective stack with a medium suited connector OOP. That's spew.
Given the dry T-high board, you needed to either bet the flop (which should just be a shove since V has about $273 behind and the pot is $200 after the preflop action)....or you check and give up. You said that the V is loose and passive.....he isn't betting $125 on the flop without a good hand....one that beats your pair of 7s....you should have folded to the flop bet, and you REALLY need to fold on the turn. I hope you won, but it's likely V had QQ, JJ or a set.