sb AJ, bad luck, or bad play?

Poker Stars $5.00 No Limit Hold'em - 6 players
DeucesCracked Poker Videos Hand History Converter

CO: $9.43 - VPIP: 13, PFR: 13, 3B: 0, AF: 0,0, Hands: 32
BTN: $3.04 - VPIP: 38, PFR: 3, 3B: 1, AF: 2,8, Hands: 826
Hero (SB): $5.00 - VPIP: 21, PFR: 16, 3B: 4, AF: 2,0, Hands: 49685
BB: $10.13 - VPIP: 10, PFR: 9, 3B: 9, AF: 2,0, Hands: 58
UTG: $5.70 - VPIP: 19, PFR: 13, 3B: 3, AF: 0,0, Hands: 108
MP: $6.69 - VPIP: 13, PFR: 0, 3B: 0, AF: 0,0, Hands: 15

Pre Flop: ($0.07) Hero is SB with A J
3 folds, BTN calls $0.05, Hero raises to $0.16, 1 fold, BTN calls $0.11

Flop: ($0.37) A 5 T (2 players)
Hero bets $0.26, BTN calls $0.26

Turn: ($0.89) 3 (2 players)
Hero checks, BTN bets $0.35, Hero calls $0.35

River: ($1.59) 8 (2 players)
Hero checks, BTN bets $0.60, Hero calls $0.60

Final Pot: $2.79
BTN shows 8 A

Bad lack, or bad play?