($11) How bad was this all-in call ?

I’m “seat 5.”

Seat 10 is the button
Total number of players : 3
Seat 5: (3268)
Seat 7: (1655)
Seat 10: (3077)
Seat 5 posts small blind (75)
Seat 7 posts big blind (150)
** Dealing down cards **
Dealt to Seat 5 [ 6c, 9c ]
Seat 10 calls (150)
Seat 5 calls (75)
Seat 7 checks.
** Dealing Flop ** : [ 8d, Td, Qc ]
Seat 5 bets (150)
Seat 7 folds.
Seat 10 calls (150)
** Dealing Turn ** : [ Jh ]
Seat 5 bets (300)
Seat 10 raises (2777) to 2777
Seat 10 is all-In.
Seat 5 calls (2477)
** Dealing River ** : [ 6d ]
Creating Main Pot with $6304 with Seat 10
** Summary **
Main Pot: 6304 |
Board: [ 8d Td Qc Jh 6d ]
Seat 5 balance 191, lost 3077 [ 6c 9c ] [ a straight, eight to queen -- Qc,Jh,Td,9c,8d ]
Seat 7 balance 1505, lost 150 (folded)
Seat 10 balance 6304, bet 3077, collected 6304, net +3227 [ Kh Ac ] [ a straight, ten to ace -- Ac,Kh,Qc,Jh,Td ]

I put Seat 10 on trips or two pair because he didn’t raise pre-flop. And I thought he was trying to stop me from drawing a flush. Was this stupid of me?? Thanks for your help.