$0.25/$0.50 No Limit Hold'em Cash, 2 Players

Hero (BB): $157.25 (314 bb)
Villain (SB): $217.44 (435 bb)

Preflop: Hero is BB with T T
SB raises to $1.50, Hero raises to $4, SB raises to $10.50, Hero Calls

Flop: ($20.50) 2 5 K (2 players)
Hero checks, SB bets $13.50, Hero calls

Turn: ($47.50) K (2 players)
Hero checks, SB bets 30.50, Hero?

We've been playing for a while, but with no prior history. About 400 hands. Both quite aggro, swingy match. He's the one loosing.

He started out playing aggro pre-flop but nitty/exploitable post. But after bleeding through my aggression he has started to adapt, with a lot more light c-raises etc. In general his weakness seems to be bad assessing my ranges when I'm betting and making many incorrect calls & folds. When he's betting he has a balanced, tricky range.

He has started to 4-bet much more now that we are very deep. When we were below 150bb he never did it. He has a very polarized 4-betting range: JJ+; AKo; maybe AQs for value, and hands like 87s as bluffs. I never expect him to have 44 or AT in that spot.

I've 5-bet 2 times. First time I had 97s, he shoved, I snap folded. Second time I had AA, he peeled, I got one street of value on the flop and he folded on turn barrel. I thought this was a terrible hand/stack size to 5-bet, but that I couldn't fold against his range, easy call.

Flop I think he's c-betting with all of his air, his monsters: AK; AA; KK. It's hard to say but imo he's sometimes c-betting his FD and sometimes checking them back. Note that he can almost never have a NFD. I think he's checking back his QQ type hands 99%. When he bets c-raising makes no sense, but folding is still too weak. Thoughts?

Turn is tricky because we haven't played many 4-bet pots. He does keep barreling - sometimes - when he 3-bets. I'm not sure that he wants to fire large amounts anymore with AA now. I don't know if he sees that as a good card to continue bluffing either, but probably not. Second K improved my hand but I'm completely crushed by his value-range, and probably need to check-call a big bet if i call this turn.

WWYD?

With that given range I would just fold pre.
And I think he has it like 95% of the time with given range.

3bet bigger. Call one more time and check fold river.

I have to agree with Khal Drogo here.

I also agree with Khal Drogo. Your 3bet size is sick small over 300bb deep. With the double flush draws out there his going to have bluff barrels here with his 4bet bluff range. AA, QQ and JJ might decide to pot control, so not a ton of value combos out there.

about 3-bet sizing: i like to make it on the smallish side vs this guy because i have 3-bet him a ton, as i think he folds his button or peels and folds to a c-bet too often. Which means i actually have more bluffs than value hands in my 3-bet range, so i like my standard rather small. But you're probably right, we're too deep now and i have to adjust by 3-betting less and bigger.

Why do we call turn and c-fold river on a blank?

That's his value range, indeed super strong, that I'm doing badly against. But I think he's 4-bet bluffing at least - probably more - as often, with a range of mostly suited connectors. I don't think I can fold preflop vs his total range, and if i am i shouldn't 3-bet with TT.

wp so far, now fold turn