For me the quiet resentment has begotten a wicked dark humour, which I'm generally good with 😏

Vent, but work to heal the underlying trauma. I've definitely met people with personality disorders that vent constantly, but they don't actually work on healing the damage and developing orthopraxia. If your perception of self or others seems destructive (even if you feel it's true) try discussing it with a professional. Maybe there's no issue, but maybe you'll get some tools to keep you from engaging in destructive behavior

There have been a ton of studies over the last several years that show that venting doesn't work, and can sometimes even make things worse. Not trying to invalidate your own experience, but this probably isn't the best advice for everyone.

https://www.sciencedirect.com/science/article/pii/S0272735824000357

Or just surround yourself with competent and responsible people, and shut out incompetent and irresponsible ones out of your life so you don't have anyone to resent.