This post is from the mid of the COVID-19 boom, which perhaps explain some of the action. However I dont think, its all that unusual for a 5NL game, and Heros actions were generally not that crazy.
Hand 1 TPTK with AQ
Going for 3 streets of value with a strong TPTK on a fairly dry runout is perfectly fine and standard. When Villain raise us on the river, this is the time, where micro stakes logic normally dictate, that we should womit and fold, because he will usually show us two pair or better.
However when he click it back, I would probably also hate life and pay him off, and I would also be "WTF just happened", when he flipped over a completely random bluff. The best explanation is, that he was on BTN and trying to make a float play. Or he was more drunk than you.
Hand 2 Nut flush with A9s
I love, how you played this hand! Usually fast playing is the best strategy, so its kind of tempting to raise that donk bet. But when you have the nut flush specifically, he can not have the nut flush draw, and this remove part of his range, which can call a raise. It also mean, that you dont need to be afraid of another flush card. At worst this might kill action, but you will still have the nuts.
On the river the board pair, which is not, what we were hoping for, but how many boats can he realistically have? QQ probably 3-bet pre, and TT is now only 1 combo. 77, QT and maybe T7s makes sense, but we are still only looking at 12 combos, and then there are all the other hands, he might play like this. Including just some random bluffs, which it is not to surpricing to see a donk better show up with.
Hand 3 Top and bottom pair with A7
This is also a very well played hand. Raising that donk bet with top and bottom is certainly the right play, and so is stacking it off on such a clean runout as this. There are no straight or flush draws, that got there, and only AQ made a better two pair.
As for their hands 4d5d probably misread the board and thought, he had turned a straight. This is something, you will see more frequently at the lowest limits like 2NL and 5NL. As for 9d8h he was just a non-believer. This is something, you see all the time in the micros, and the reason why thin value betting is so hugely profitable against recreational players, while big multistreet bluffs are not.
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