I'll play devils advocate. If the ex did you dirty it does kind of feel like vindication when you see them go on to flop. You're like "My my how the turns have tabled." Idk, it's dickish, but you'd understand in certain contexts.

Don't worry bro. Work hard and you too can be one of those guys 30 something year old single moms want when they realize their market value went way down and they may have a free ticket out of living with their sister.