Hand 1: I would have probably played just like villain. Did you expect him to fold TPMK and a flush draw on the turn?

Hand 2: Granted the preflop call was donkish but then he slowplayed trips all the way and got maximum money out of you.

Hand 3: You gave him odds to call all the way - $.20 into a $1 pot is not a good bet. $.50 into a $1.40 pot is not a good bet.

I have also struggled with this but you have to make these guys pay for their stupid plays. Hand 3 if you had bet say $.80 he wouldn't have had the right odds to call - then he's making a stupid play. On the river if you bet $1.20 into a $1.50 pot again, he doesn't have the right odds. I'm still working on these exact numbers and pulling them out of my ass quickly but I know these bets are the wrong size.

Maybe there were other hands I didn't see but these three I thought were totally fine and you got beat by not betting properly.