Why me?

I really don't understand why this sort of thing keeps happening. I really don't.

Full Tilt Poker Game #_: $5 + $0.50 Sit & Go (_), Table 1 - 30/60 - No Limit Hold'em - 21:42:42 ET - 2007/08/21
Seat 2: (1,465)
Seat 3: hero (3,845)
Seat 5: villain (3,690)
Seat 2 posts the small blind of 30
nsayer posts the big blind of 60
The button is in seat #5
*** HOLE CARDS ***
Dealt to hero [Jd Ts]
villain raises to 210

This guy has been getting out of line all tourney long. His pre-flop raises no longer have any value.

Seat 2 folds
hero calls 150
*** FLOP *** [7c Td 9h]

If he has an over-pair, then so be it. But I just don't think he does.

hero checks
villain bets 450
hero raises to 1,800
villain raises to 3,150
hero raises to 3,635, and is all in
villain calls 330, and is all in
hero shows [Jd Ts]
villain shows [9c 8d]

Uh huh. Outside straight draw. He's a 2:1 underdog at this point. He can't get the 8 for two pair, since that'll give me the better straight.

Uncalled bet of 155 returned to nsayer
*** TURN *** [7c Td 9h] [6d]

Naturally.

*** RIVER *** [7c Td 9h 6d] [4s]
hero shows a pair of Tens
villain shows a straight, Ten high
villain wins the pot (7,410) with a straight, Ten high
*** SUMMARY ***
Total pot 7,410 | Rake 0
Board: [7c Td 9h 6d 4s]
Seat 2: (small blind) folded before the Flop
Seat 3: hero (big blind) showed [Jd Ts] and lost with a pair of Tens
Seat 5: villain (button) showed [9c 8d] and won (7,410) with a straight, Ten high