Villain is fun player in this instance. Decided to delay cbet, hoping for no club. Then hoping to check down.Is that too weak?
Don't normally bluff catch but I expect he goes bigger with value and maybe x/c weaker flushes so he has a lot of bluffs??

iPoker - 2,000/4,000 NL - Holdem - 9 players
Hand converted by PokerTracker 4

UTG+1: 11.27 BB (VPIP: 22.22, PFR: 16.90, 3Bet Preflop: 0.00, Hands: 72)
MP: 10.61 BB (VPIP: 20.00, PFR: 7.14, 3Bet Preflop: 0.00, Hands: 15)
MP+1: 4.92 BB (VPIP: 6.67, PFR: 7.14, 3Bet Preflop: 0.00, Hands: 15)
MP+2: 16.4 BB (VPIP: 26.32, PFR: 8.13, 3Bet Preflop: 2.50, Hands: 134)
CO: 53.5 BB (VPIP: 40.00, PFR: 5.13, 3Bet Preflop: 0.00, Hands: 40)
Hero (BTN): 19.1 BB
SB: 12.58 BB (VPIP: 33.33, PFR: 20.00, 3Bet Preflop: 0.00, Hands: 15)
BB: 28.49 BB (VPIP: 30.29, PFR: 9.68, 3Bet Preflop: 7.69, Hands: 356)
UTG: 49.34 BB (VPIP: 50.00, PFR: 0.00, 3Bet Preflop: -, Hands: 2)

9 players post ante of 0.08 BB, SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 2.22 BB) Hero has Q A

fold, fold, fold, fold, fold, CO calls 1 BB, Hero raises to 3.34 BB, fold, BB calls 2.34 BB, fold

Flop: (8.9 BB, 2 players) 6 K A
BB checks, Hero bets 4 BB, BB calls 4 BB

Turn: (16.9 BB, 2 players) Q
BB checks, Hero checks

you bet 4BB on the flop, how c-bet is being delayed here.

c-b bigger against a fish, rest seems fine. I'm never folding river for that price

It's not a bluffcatch becuase he's never bluffing that size. The question is whether he would blocker bet a worse hand than yours.

Bet bigger on the flop. River is an easy call given the pot odds.