Thank you for posting
When we are confused in a hand it is because we did not preplan it. We develop our preplanning in-game skills by studying the hand off table by using available data
from the hand and tools like GTO charts etc.
First data point preflop-
V has 20bbish stack GTO chart says what range opens in this spot?-if u do not have access to charts there are free charts available out there.
To keep it simple in this example V opens a tight range A9off + A3s+ 66+
Our GTO range bottom to play vs the V is AT off
Second data point Both the blinds are sub 20bb so they can shove and should be shoving some % of the time. This requires us to tighten our calling ranges in this spot as we do not want to call and fold to the shove.
Good to look at what the blind GTO shove ranges are and use equilab to see what your equity would be with A9off vs those ranges.
At this point in data gathering it appears A9 is a fold most often here.
As played
Our V has SPR of 3 and this is a terrible flop for us as any bet we make is polarized because we are capped preflop. Plus the V is not going to fold top of range because you might have a Q. The V will also check top of range to you as they will play for stacks here so they will trap often.
We want to think about our sizing on this flop if we have a Q do we really bet half pot into such a short stack? Solver sizing is 25% in spot like this. The big bet comes on turn with Qx and bluffs.
Hope this helps