Villains was stealing 45% over 45 hands

PokerStars - $10+$1|400/800 Ante 100 NL - Holdem - 9 players
Hand converted by PokerTracker 4

MP+1: 1,532 (VPIP: 11.11, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 9)
MP+2: 22,915 (VPIP: 25.22, PFR: 15.25, 3Bet Preflop: 5.75, Hands: 231)
CO: 45,326 (VPIP: 28.30, PFR: 22.64, 3Bet Preflop: 9.09, Hands: 54)
BTN: 12,465 (VPIP: 20.00, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 5)
Hero (SB): 9,062
BB: 15,120 (VPIP: 20.00, PFR: 28.57, 3Bet Preflop: -, Hands: 10)
UTG: 27,490 (VPIP: 12.20, PFR: 13.79, 3Bet Preflop: 9.09, Hands: 41)
UTG+1: 13,810 (VPIP: 13.33, PFR: 8.33, 3Bet Preflop: 0.00, Hands: 15)
MP: 14,439 (VPIP: 27.93, PFR: 19.53, 3Bet Preflop: 7.25, Hands: 183)

9 players post ante of 100, Hero posts SB 400, BB posts BB 800

Pre Flop: (pot: 2,100) Hero has 8 A

fold, fold, fold, fold, MP+2 raises to 1,600, fold, BTN calls 1,600, fold, fold

Flop: (5,300, 2 players) 5 4 Q
MP+2 bets 1,800, BTN raises to 4,800, fold,

what is your question exactly?

Should i have raised pre since he was stealing so often?

Seems like an easy fold to me, unless you shove, but that's marginal at best.

You could try to shove here in that situation.. Its really close tho

Do we like flatting hear?

Flat with 12bb stack? Its obviously push or fold spot..

Would never flat. Jam is ok if they are very loose but my standard is fold

if it was just against him then easy shove imo.

i'd be more concerned with the btn flatting with 15BBs here. interpreting what this means is the key to me.