Nicholasj, since your sitting right next to him, I'd definitely say your a better judge of his competency then the forum.
Wheres all the big cards, everybody folded except you two utgs. With his position, and all the folds, im definitely putting him on JJ+, AJs+.
I like preflop.
I like the board a lot. I like your call, he's letting you in cheap.
Turn misses, still priced into calling.
River bricks, evaluate. His Bet sizing seemed small for a big overpair. Jam reps 99 or 10 10 and is in line with your calls but not your preflop.
Call, jam or fold. His bet sizing is almost saying DRAW.
Cards in the muck. Come on Dealer...