NL50 turned flush on paired board

Posted 7 years, 9 months ago

Blinds: $0.25/$0.50 (6 Players) BN: $29.11
SB: $50.00
BB: $51.83 (Hero)
UTG: $100.04
MP: $63.43
CO: $50.00

Preflop ($0.75) Hero is BB with K Q

UTG folds, CO raises to $1.50, 2 folds, Hero calls $1.00

Flop ($3.25) T 3 T

Hero checks, CO bets $1.50, Hero calls $1.50

Turn ($6.25) T 3 T 5

Hero checks, CO bets $4.00, Hero calls $4.00

River ($14.25) T 3 T 5 Q

Hero checks, CO bets $8.00, Hero calls $8.00

Final Pot BB wins and shows a flush, King high.
CO lost and shows two pairs, Aces and Tens.
BB wins $28.74
Rake is $1.51

As played I think I should have raised the turn.

I put this in a solver and it didn't have a calling range on the flop. Why is it better to x/r hands like 44 and 87dd on the flop?