Playing 1/2.game is 4-handed at this point, hero with 290, V covers.

Preflop:H on the button, V straddles to 5 from UTG. H flats with Qc9d, SB folds, BB calls. V raises to 20, H and BB both call (BB calls nearly every raise preflop and folds flop)

Flop: QsJs7c. BB checks. V bets 35, H calls, BB folds.

Turn: 10d. V bets 55, H calls with the newly picked-up open-ender.

River:Ks. V jams. H?

Thought process - were losing to any ace and any 2 spades. AK is a possibility, but probably not jamming after the 3rd spade hits and H called flop and turn. Same for AQ, AJ, and any AT other than AsTs.

We're beating AA, KK, QQ, TT, JJ KQ, KJ (all hands that V could have given the action).

V is a strong aggressive player who absolutely had the capacity to bluff on this board.

I end up tank-calling, V shows 6s8s for the flush.

Am I overthinking this and should have just folded the bottom straight on this board? While bummed, I'm actually pretty with the call. Am I wrong?