25nl - passive line against short stack

[Avocado]

villain is 73/5/1 over 20 hands. he limps almost every hand.

i think my play was terrible, but i don't know why. someone please tell me. thanks.

Party Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
5 players
Converter (http://www.neildewhurst.com/hand-converter)

Pre-flop: (5 players) Hero is Button with T/images/graemlins/spade.gif T/images/graemlins/club.gif
UTG calls, <font color="#cc0000">CO raises to $0.5</font>, <font color="#cc0000">Hero raises to $1.75</font>, SB folds, BB calls, UTG folds, CO calls.

Flop: K/images/graemlins/heart.gif 3/images/graemlins/heart.gif 7/images/graemlins/diamond.gif ($5.6, 3 players)
BB checks, <font color="#cc0000">CO bets $1</font>, Hero calls, BB folds.

Turn: 2/images/graemlins/spade.gif ($7.6, 2 players)
<font color="#cc0000">CO bets $1</font>, Hero calls.

River: J/images/graemlins/club.gif ($9.6, 2 players)
<font color="#cc0000">CO is all-in $3.8</font>, Hero folds.
Uncalled bets: $3.8 returned to CO.

Results:
Final pot: $9.6

[Caelallaiach]

Preflop:
When a passive player raises, you know he has a good hand, especially when they min-raise. Fish love to min-raise big pocket pairs because they don't understand implied odds and think they are trapping but are in fact trapping themselves. When they do this you really want a pocket pair or suited connectors so you can call and stack them if you hit the flop hard. So you should just flat call with your TT here hoping to hit a set (by the way I fold AQ or worse here).

Flop:
So he only bets 1/5th pot, but not sure what you beat here since he is only raising 5% of hands but it so weak so I suppose you have to call, he could be randomly bluffing I guess.

Turn:
Same argument as the flop, but I guess you have to call a 1/7th pot bet, but I can't think of a hand you beat apart from AQ unhit?

River:
Easy decision now, just fold, I think you behind here nearly everytime.

Just flat calling preflop makes you lose less on this hand.

[Vyse]

Fish love this line: minraise PF, bet small on flop and turn, and massive overbet on river. Since he was a short stack (please include stack sizes), calling his bets were bad, since you weren't getting the right implied odds if you miracled a T.

[Caelallaiach]

Sorry I completely didn't mention that to call preflop hoping to stack only works if his raise is like 5% of his stack, here it is closer to 10%, but there is a limper in front of him that will also call, so a pre-flop call is okay.

Can he fold flop for 1/5th pot bet?