Hi! I personally think it’s a good fold, he could have clearly made 2 pairs on the turn with some of J-8/J-9 hands or mabye defending a Q-10 on the BB and flopped a double-gutter and get it on the turn, then leading to make flush draws fold because you are still 4 in the hand at this point. Even if an offsuit queen or 7 hits the river you are not necessairely holding the nut. Good fold i’d say.