Most are not unpleasant people. Perhaps the most prevalent thing is senior FOs that are burnt out and doing the job on autopilot or to a lesser extent regional captains/check-airman that like to think they’re still the PIC.

I get it. 10(+) years doing multiple legs per day in a cramped 73 cockpit. It’s enough to burn people out, but don’t just go rogue or put on the check FO hat.