Just sat down, knew nothing about kraaj. Was thinking he was weak pre-flop, because 20c. Either 10c raise, or a high raise i might respect the bet more. feeling good about the turn. thought he was trying to steal with the re-raise. Turn: was actually going to re-raise. Lost my nerve with the big amount so soon in to my session.

(turned out this guy was a whackjob) Took all his money later

I would either raise this to .60 preflop (if you really want to play it) or just fold. Folding is really the best option here, this is a very weak hand and you are only in middle position. This hand would play much better on the button when you are able to put in a big raise preflop over many limpers. Still you're probably safest just folding.

On the flop I would prefer to lead a little bit harder here, more like .80 into so many players. His min raise is usually very very strong here. Even though he only 2x preflop, you also have to consider that he's raising everyone else in the hand as well.. which makes it less likely he has air. The raise is small so it entices you to call, but really there are several reasons why it's bad.

First, there's a decent chance you're flat out beat here. If you are ahead then there are many terrible turn cards for you and you're oop. Any diamond is bad, as well as any TJQK. This is basically half the cards in the deck that will make your hand tougher to play. It can be ok to call with the intention of either leading hard or check raising a safe turn card, but I'd probably prefer to raise or fold the flop.

As played, unless he was a total psycho, you were probably beat. It's also not worth making crazy moves against a player you have no info/history with. In general just play abc until you have strong reasons to make a play against a particular player.