[philipov]

I believe men's cognitive biases predispose them to seeing the fact they've spent money as justifying some sort of entitlement. To such people, getting justice for perceived slights is worth burning everything down around them. If someone undeserving is on their team, they would rather lose than see that person win, like crabs in a bucket.

I have even seen people admit to doing this. That's why you can't appeal to reason by explaining that their behavior is contributing to the loss. Once someone begins to rage, they have already decided that justice is more important than victory.