Analyze this for me

If I would stop trying to slow play and start betting the pot things like this wouldn't happen.

PokerStars No-Limit Hold'em, $0.25 BB (8 handed) converter

SB ($12.40)
BB ($13.50)
UTG ($7.65)
UTG+1 ($10.15)
MP1 ($14.85)
MP2 ($7.95)
CO ($26.70)
Hero ($24.65)

Preflop: Hero is Button with Q:club:, K:heart:.
UTG calls $0.25, UTG+1 calls $0.25, 2 folds, CO calls $0.25, Hero raises to $0.75, 2 folds, UTG calls $0.50, UTG+1 calls $0.50, CO calls $0.50.

Flop: ($3.35) J:club:, 3:spade:, Q:diamond: (4 players)
UTG bets $0.25, UTG+1 calls $0.25, CO calls $0.25, Hero raises to $1.25, UTG calls $1, UTG+1 folds, CO calls $1.

Turn: ($7.35) A:club: (3 players)
UTG checks, CO checks, Hero bets $3.25, UTG calls $3.25, CO folds.

River: ($13.85) 8:club: (2 players)
UTG checks, Hero bets $2.5, UTG calls $2.40 (All-In).

Final Pot: $18.75
Main Pot: $18.65, between UTG and Hero. > Pot won by UTG ($18.65).
Pot 2: $0.10, returned to Hero.

Results in white below:
UTG has Tc Ks (straight, ace high).
Hero has Qc Kh (one pair, queens).
Outcome: UTG wins $18.65. Hero wins $0.10.

You said it. You need to bet more on the flop. Just get to doing it. TP is an extremely vulnerable hand, especially against more than one opponent. Heads up you can maybe bet less if there's not any draws out there. I used to bet way too little in this situation too. Just bet more, man. Tape a sticky to your computer or something - BET THE POT WITH TPGK.