Why did I only have 40% Equity =( ??

Posted 8 years, 7 months ago

Blinds: $0.01/$0.02 (6 Players) BN: $2.28
SB: $2.06
BB: $2.14
UTG: $2.03 (Hero)
MP: $6.20
CO: $1.27

Preflop ($0.03) Hero is UTG with K A 4 A

Hero raises to $0.07, MP folds, CO calls $0.07, 3 folds

Flop ($0.17) J 6 Q

Hero checks, CO bets $0.16, Hero raises to $0.64, CO raises to $1.12, Hero raises to $1.96 and is all in, CO calls $0.08 and is all in

Turn ($3.33) J 6 Q 7

River ($3.33) J 6 Q 7 2

Final Pot UTG lost and shows a pair of Aces.
CO wins and shows three of a kind, Jacks.
CO wins $2.49
Rake is $0.08

Hi I figured I missplayed this hand because I have 3 diamonds in my hand therefore blocking one of my outs.

How should I have played it?