How to extract more value?

Poker Room skin
Pot Limit Holdem Ring game
Blinds: $0.25/$0.25
9 players


Stack sizes:
UTG: $27.10
UTG+1: $5.25
Dirk Dollar: $23.50
MP2: $24.95
MP3: $55.35
CO: $42
Button: $17.45
SB: $18.20
BB: $6.30

Pre-flop: (9 players) Dirk Dollar is MP1 with
UTG raises to $1, UTG+1 folds, Dirk Dollar calls, 3 folds, Button raises to $1.75, SB calls, BB calls, UTG calls, Dirk Dollar calls.

Flop: ($8.75, 5 players)
SB checks, BB checks, UTG checks, Dirk Dollar checks, Button checks.

Turn: ($8.75, 5 players)
SB checks, BB bets $2.5, UTG calls, Dirk Dollar raises to $18.75, 2 folds, BB calls all-in $2.05, UTG folds.
Uncalled bets: $14.2 returned to Dirk Dollar.

River: ($20.35, 1 player + 1 all-in - Main pot: $20.35)


Results:
Final pot: $20.35
Dirk Dollar shows 6C 6H
BB shows AC 5C