Welcome to the forum. In poker we dont play a hand backwards depending on, what the outcome would have been. It seems like, you posted, which is a losing play in itself. So the first advice is to not post but wait for the blinds to come around to you. However as played 52o is a clear fold facing a 4BB raise, since its one of the worst possible starting
hands.
Finally VPIP means Voluntarely Put Into Pot. Raising preflop is called PFR, and just because someone play many hands (high VPIP) does not always mean, they raise a lot. So maybe this raise from BTN was actually a somewhat decent hand, whereas if he had a marginal hand, he would have limped behind your post and then check.