[RyanJM]

76 call was fine preflop because it seemed like he was just getting frustrated (although he actually had a hand). The post-flop call was standard for this level of opponent. I snap-call a huge overbet shove on the flop like that. It's such a donk move and extremely obvious that they either have bottom pair or two high cards that missed. It's one of those psychological things where your donk-opponent is frustrated that he missed the flop and thinks that if he bets enough you won't call with anything but a monster.

Oh and gulon, I wouldn't focus so much on the math for HU poker. It's much more feel and understanding your opponent. You really only need basic math calcs to be successful, and a ton of experience in understanding the flow of a match and betting tendencies etc...