[Pokey]

I'm much more unhappy about your flop play than your preflop play.

Preflop is usually bad because AK plays best heads up, suffers badly from RIO, and doesn't do well OOP. A big and punishing raise to $3 cleans out the detritus and lets you win often preflop and even more often with a c-bet of 2/3rds-pot.

On the flop you're sitting on the direct right of the likely raiser in a multiway pot and you DONK it?? Awful. Just terrible. You played it slow preflop so that you could have this EXACT situation come up and then you blew it. If you checked, MP would c-bet most of the time, probably to $1.50. Then, after button and SB called the bet, your call makes it $8.10 and you can safely raise all-in. That's a pot-sized raise that folds out MOST of your opponents, winning you a HUGE pot uncontested. If you're called it's likely to be by a drawing hand and you'll be ahead, or it'll be a weaker pair figuring you for a draw and you'll blow it out of the water.

Your preflop play can occasionally be acceptable depending on table conditions, but your flop play is totally unacceptable and costs you much money in the long run.