hand 1: this is what happens when you go into c/c mode and play guessing games
you basically created a situation for yourself where you have no profitable line to take after you c/c the flop so I would fold turn

it's "lol scarecard" but also you have such a defined range he has multiple options of how to exploit you
you're behind his entire distribution and can't call two streets (turn and river) because basically he's going to either bet both or check back turn

hand 2: I fold because donkish players will bet 55 here because they put you SQUARELY on AK or something or because they have no idea what to do if they check and you shove

hand 3: given the timing I just think it's a nut hand
I'm not gonna put straights in his range, but I think these are possible:
AQ (unlikely, he might vbet small instead), QJ (makes the most sense), JJ, 55, 88, QQ-AA
like there's no reason to think he's full of shit, is there?