(Fee will be referred to as "Hero" in this section.)

Hero's range is doing very poorly on this flop versus his opponent's range. This equity graph visualizes just how poorly his range is doing:

A huge portion (~70%) of the Villain's range has Hero's range absolutely crushed with around 90% equity -- this represents the Villain's AAxx hands. The rest of Fee's range doesn't fair so well either (which is why the blue line is below the red line at almost every point in the graph).

To quote Chris:

I think it's easy for all of us to understand and identify when we're at a big range disadvantage like this, if we've played a fair amount of PLO.

One thing that may be less clear is how to respond whenever we're at that range disadvantage.

...when [Monker Solver] faces a small bet and it knows its in such a terrible position, it's immediate priority is to rid itself of that awful position as quickly as possible -- because the worst thing that can happen for it is finding itself in the same quandary on the following street.

[Monker Solver] is at this terrible range disadvantage, it's facing this very small bet, with very great pot odds [to call]. And nonetheless, it's still folding 80% of its range because it really wants to reposition itself so that, on future streets, it doesn't have to deal with being in such a bad position.

In other words, the solver chooses to over-fold on the flop, even versus the tiny 15% pot-sized bet, in order to reduce its range disadvantage going into the turn. By looking at the equity graph on the turn, we can see that it's successful in doing that:

Hero is no longer getting crushed everywhere. In fact, he's now winning at the top of the ranges quite a bit (pointed at by the green arrow). That's the portion of Hero's range that can beat pocket aces with either quad sixes or pocket sevens.

By folding so often on the flop, the solver has narrowed its range to the point that over a third of its hands now beat pocket aces on this turn. This makes the hand more competitive going forward -- the Villain no longer has an absurdly massive range advantage like he did before.

Let's wrap this section up with some advice from Chris about this and similar spots:

So that's one heuristic:

When you find yourself at a range disadvantage, don't worry about "fighting back." Don't worry about making sure you don't get pushed around or anything like that.

Rather, try to reposition yourself as quickly as possible so that on following streets, you're much more competitive.