A particularly unprofessional pleasure you get at winning a case against a singularly obnoxious and difficult opponent who comes in for heavy criticism for the judge for the precise same things that you have found so obnoxious in the seemingly endless months you have been dealing with them before the case gets to a final hearing . It is unseemly to appear to take pleasure in winning family law cases where everyone is supposed to be a winner so this is best expressed by sneaking round the corner where no-one can see you and punching the air.
You’re right. Schadenfreude isn’t precise enough. “Crowisfaction”?
Ah, I know that pleasure very well…
Justicification?
Benchmark?
Sorry, it’s late and I can’t do any better.