Gosh, I swear this thread already happened.
* Folding A3o in the SB limped around is just fine. As you say, we're oop (to multiple players), an ace spikes there's no way to have any confidence we're not dominated, flush is unlikely...Just a money pit situation. For every time you play and it works, there's a dozen other times where you just check/fold the flop, and you can actually catch a beat hand and really get in trouble. When the captain tells you how to play, appear interested and newly educated, then outplay them. "Ah! Ok, I see now..."
* Pre is fine imo. Note V's speech here. He's calling you tight/passive, verbally ranging you on a big hand. You probably need to open you raising range a bit in general. This could be why you got HU, because the others possibly percieved the same and just got out the way.
* Flop should be higher, like 80%psb (like 20-24ish). You're TPTK is vulnerable to SD's (unlikely given pre action but still there), and FD's (certainly possible...).
* Turn is call, I guess. He could conceivably have air, trying to rep the flush.
* What I remember from the other thread is berating your choice to toss in the extra $13. This is very much a crying call, we're bluff-catching. Throwing in the extra $13 is likely just value-towning yourself. While he certainly won't fold to the $13, he may or may not bother to bet it on the river, so why chip it in? That's $13 less on your re-load if you bust the hand. Putting it in accomplishes little imo. It feels very much like the tournament mentality many fish exhibit, where the stack gets hammered, so they put the rest in in a very -Ev spot, feeling commited to playing it all.