First MTT Post - Outplayed by BB or Fundamentally Flawed Play?

[pokerbratwurst]

Final table of private tourney. 28 started, 3 pay. Series points and bragging rights also at play. My 3rd hand at the table, no previous play with Anti-hero, but I am aware that the better players in the series really admire many facets of his game.

All comments welcome.

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) internettexasholdem.com

saw flop|<font color="#C00000">saw showdown</font>

UTG (t1310)
UTG+1 (t1875)
MP1 (t9462)
MP2 (t5530)
MP3 (t2561)
CO (t6287)
Hero (t3485)
SB (t2580)
BB :Anti-hero/ (t5910)

Preflop: Hero is Button with Q[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Hero raises to t450</font>, <font color="#666666">1 fold</font>, BB :Anti-hero/ calls t300.

Flop: (t975) K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Anti-hero checks, <font color="#CC3333">Hero bets t500</font>, <font color="#CC3333">Anti-hero raises to t1000</font>, Hero calls t500.

Turn: (t2975) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Anti-hero checks, Hero checks.

River: (t2975) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Anti-hero bets t4460 (All-In)</font>, Hero folds.

Final Pot: t7435