SH Zoom A3s, SB vs BB, 4bet Bluffing

Pre's okay, 4bet bigger though oop, 2.5X is good

Postflop's a spew, I'm guessing you got induced by his small sizing and are trying to justify it afterwards, I've done that loads of times myself ;P
At micros it's rarely correct to way overbluff heavily as people call too much and since this is pretty much one of the worst hands in your range and you have little equity and even remove Ace highs that might bet fold he can just call everything vs you and be correct.

check fold or bet 1/3 pot to shove heart turns, check call A turn. It'll be close on 4,5 turns probably check fold too.

preflop make it @ least 2.40$
cbet max 40% of the pot having strategy to continue in some equity turns.

As played on flop for this price call and fold most blank turns if continues or revaluate river if he xbacks ...