I have to agree. If I was in the hand, I would put you on bottom pair, or draw, flop, turn. River, I am putting you on a bottom pair, middle pair, or top pair, crappy kicker, basically hands like Q2, Jx, Tx, that calling minbets flop, turn, that semi bluffing river. At likely worst, even if don’t have bottom pair, and have nothing, I am at least putting you on something better then A6, like A7, A8, A9, that missed, that beats A6, that your turning into a semi bluff, bluff. Those kind of holdings fit the story, action, how the hand played out. And all those semi likely holdings beat A6.
And the 6 of spades makes it more likely that you don’t, didnt have a busted spade flush draw that bluffing the river.
There is only about a 3% to 7% to 13% to 23% chance that bluffing with a nothing that his A6 beats. And because of that, he needs to have his call be right about 77% of time to be profitable over the long term in this kind of spot, an or needs 5.5 to 1 pot odds to make a ultimate hero call.
7.5 times out of 10 in this kind of spot, situation, board texture, etc, if he calls you, he is beat.
Also the river could have completed 3 card possible straight that you shoving because since he was betting every street he might have something better then A6 to call, pay off a semi polarized 3 card straight shove.
Also with the last 3 cards of board being Q, T, J, Punisher could easily have had JT, where he flat calling on pair of tens, and made 2 pair on river, and again shoved river because Villain might have something good enough to pay off a semi polarized 2 pair JT.
Just so many, too many ways that villain is semi likely beat, that fits the story, action, how the hand played out, etc.
Because of that, even tho it technically was right call, ahead, per se, it was the wrong call, a bad call, and Villain was just being a call station. Villain just got lucky that his bad, call station call worked out for him, and that you had 56 nothing instead of hands like Q2, Jx, Tx, A7, A8, etc, that turned into semi bluff, bluff, that beat A6.
In the future, Villain will stack off, punt, pay hero off in future big time, if Hero ever plays against him in the future.
Also, pretty sure a solver, GTO wizard, etc, would probably say that Villain should have folded to your river shove.