1.) i woulda put all my chips in before the river. the chance he has something that beats top pair after 7 cards isnt bad. i would probably have pushed on the turn if i decided i was going to tie myself into the hand. however, i would probably have slowed down and checked the turn. not a terrible play but you do realize after 7 cards you have one pair on a straight board. the guy was an absolute moron though.

2.) two pair vs set, youll probably lose money every time. but something to think about...calling doesnt necessarily indicate weakness. it also represents strength. it says 'you cant push me out of this hand, i belong in here just as much as you.' i would have bet two pair the same but once again, getting married to one pair is never a good idea.

3.) you have a very weak hand here. what hand is going to call you that you have beat? only hands that will call are ones with a Q or ones with an A. i say you are either looking to tie or lose this pot. i would check/fold this one if ever given a sign of strength and since none was given id be happy to see a free showdown.

i agree with you that players this passive are annoying to play with. just make value bets (not all in after 7 cards with a pair) when you think youre ahead and youll be fine. youre not a terrible player by any means.