NL400 set on bad board

Hi, I just post here to have an answer from an HU specialist middle/high stakes

$2/$4 No Limit Holdem
PokerStars
2 Players
Hand Conversion Powered by weaktight.com

Stacks:
Hero (SB) ($640.92) 160bb
BB ($1,014.98) 254bb

Pre-Flop: ($6, 2 players) Hero is SB 6♠ 6♥
Hero raises to $12, BB raises to $36, Hero calls $24

Flop: 9♥ 6♦ 3♠ ($72, 2 players)
BB bets $50, Hero raises to $152, BB calls $102

Turn: 5♦ ($376, 2 players)
BB checks, Hero bets $264, BB calls $264

River: 8♣ ($904, 2 players)
BB bets $562.98, Hero calls $188.92

Final Pot: $1,281.84

80/70 40% 3bet
call 3bet 50% , fold 40%
29 WTSD
more "calling" type
can 3 barrels bluff
if he cbet, he often fires a 2nd barrel
4b (10%) but he 4bet/called 67s, 44 and QQ+