Villian have pfr 62%, very small sample (8/13). He 3bet 22%. Donk 75% on flop.I have a pretty tight image with flat pfr 38% and only one 3bet. He did 4bet me NAI and I folded. Now for the 2nd time in the match i 3bet and again he 4bets. So villian seem like the kind of player who contests every pot and likes to take the lead, but the sample is very low.

PokerStars - $14.39+$0.61|15/30 NL (2 max) - Holdem - 2 players
Hand converted by PokerTracker 4

Hero (BB): 1,039
SB: 1,961

SB posts SB 15, Hero posts BB 30

Pre Flop: (pot: 45) Hero has A T

SB raises to 60, Hero raises to 175, SB raises to 350,

need more info. how often he defence bb. if defence a lot bb i would ship it

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he could only be running good at the moment, i'm pretty sure that he isnt like 4beting you with 6-9 2nd time in match...i would make crying fold its still really early in match and no enough reads. I would probably shove 66+ AJs+ AQo+ even AJo sometimes.

His click it back 4-bet is pretty weird and fishy.
My experience in these kind of plays is that his min 4-betting range is super strong like really premium hands like AA,KK,QQ(maybe) and almost never AK or AQ.IMO he tries to reel you in giving you the pot odds to put money in the pot with the worst hand.I have witnessed it soooooo many times that I am like 80%sure he tries to trap with his 4-bet sizing.
Now you say that this villain is really aggro and tries to contest every pot.If that's the case I recommend that you flat his 4-bet with AT and play aggresively any T-high or A-high flops against this guy since he likes to take the initiative and donk bet every single flop(75% donk bet is huge even in a small sample).I dont think i would fold against him and because he did 4-bet again theres a chance of him monkeying around but keep in the back of your head that he may be trying to trap right here!