PokerStars - $0.10 NL - Holdem - 9 players
Hand converted by PokerTracker 4

BB: 239.6 BB
UTG: 100 BB
UTG+1: 110.1 BB
Hero (MP): 181.2 BB
MP+1: 94.1 BB
MP+2: 89 BB
CO: 217.1 BB
BTN: 144.4 BB
SB: 250.5 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has K Q

fold, fold, Hero raises to 3 BB, fold, fold, fold, fold, SB calls 2.5 BB, fold

Flop: (7 BB, 2 players) Q Q 6
SB checks, Hero bets 2 BB, SB calls 2 BB

Turn: (11 BB, 2 players) 2
SB checks, Hero bets 5 BB, SB calls 5 BB

River: (21 BB, 2 players) 7
SB checks, Hero bets 10.1 BB, SB raises to 50.4 BB, Hero calls 40.3 BB

SB shows A Q (Three of a Kind, Queens)
(Pre 70%, Flop 76%, Turn 86%)
Hero mucks K Q (Three of a Kind, Queens)
(Pre 30%, Flop 24%, Turn 14%)
SB wins 116.3 BB

I would be betting bigger on the flop and turn. You flop the almost-nuts 180BB deep, you need to get money in, SB will have lots of sticky pocket pairs.

River is a straightforward call for me with no straights, no flushes and the occasional worse Qx. Sure he can have 77 etc from time to time but you're getting 2/1, defo not folding even if river CRs are generally v strong

Make a note re SB preflop play (and also notice that the SB should be furious at not getting a lot more of your stack)

Looks fine. You probably should bet little bit bigger at some point, but def dont want to put too much of our stack in. SB cold calling ranges are very tight and AQ 66 are fairly big part of that range.
AP-Fold riv, you have bluff catcher in spot where pool has very few bluffs.

Try to withhold results as sometimes replies are skewed with the extra information, and besides, the results aren't so important, making the correct decisions is.

I think your chosen sizings are ok.. Maybe a few extra bb but look at the texture.. Hero is trying to value bet vs a thin range imo.. With the 2 Q's on the flop, and hero holding KQc, there isn't many feasible Qx in villains range that are ahead given action.. but given villains chosen line we can assume that hero is playing vs a nutted range in an underbluffed spot... When I followed the hand I kinda thought yeah villain binked with 77, but 66,77,AQx,KQx,QJx are all possible obviously, but underbluffed spot = hero sigh folding.. Meh.. Whatever..

Nh

Perhaps more instructive from this hand is considering how much more SB would have won with a preflop 3bet.