Bet more preflop?

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) from (Format: FlopTurnRiver)

Button ($5)
SB ($14.30)
Hero ($24.75)
UTG ($9.85)
UTG+1 ($9.60)
MP1 ($13.70)
MP2 ($2.35)
CO ($7.10)

Preflop: Hero is BB with K, K.
2 folds, MP1 raises to $0.4, 4 folds, Hero raises to $1, MP1 calls $0.60.

Flop: ($2.05) 3, 8, 3 (2 players)
Hero bets $2, MP1 calls $2.

Turn: ($6.05) 6 (2 players)
Hero bets $5.7, MP1 raises to $10.7, Hero calls $5.

River: ($27.45) J (2 players)

Final Pot: $27.45

Results in white below:
Hero has Kd Kc (two pair, kings and threes).
MP1 has 3d 3s (four of a kind, threes).
Outcome: MP1 wins $27.45.

Usually play 8 tables (max on pokerstars), alot of bad runs, like calling 2 all in with AA and turns over 99 for a set. Lost 5 buyins, took a break, now Im hitting it again. Sometimes after having a bad run, I dont know if I am playing correctly anymore. Thanks for the assurance