your betsizes are too small
(flop isnt 3bet btw, its a normal raise, order is bet, raise, 3bet, 4bet (cap in limit), 5bet,...)
if u raise flop (which I dont always do seeing I'm in position and board is dry) u have to make it more, raise to 3/4pot-pot=> ~5$ or 4.9$ or something like that
turn I bet 6+ as played but normally ~3/4pot
river I bet 12 as played, if u bet the flop and the turn larger u can shove the river without it being an overbet (+u give very bad pot/implied odds for straight draws)
hope u noted that he called the riverbet instead of shoving the 2nd nuts here