From EP 77 is one of the worst hands, Hero should open, especially with this stack size. And just as a pure default, when we have one of the worst hands in our range, we should fold to 3-bets. This situation is a little special, because its an undersized 3-bet. So maybe we can call, but the spot still kind of suck, because the SPR will be just around one, and what are we really going to do, unless we flop a set?
I guess, this is why, Hero jammed. But Hero has almost no fold
equity given, that both opponents have already put in nearly a third of their stack. And if there is no fold equity, then Hero is not getting a good price committing his entire stack to defend an initial investment of less than 10% of his stack. So on balance I would just pretend, someone had already shoved, and fold this hand.
Of course knowing their hands this was a profitable jam, but if either opponent has a bigger pair, hero is getting it in with less than 20% equity in a 3-way pot. And bigger pairs will be a big part of either opponents range. So this was an absolute best case scenario, which will only happen one in five times or something of that magnitude.