This is probably the wrong site for this, but maybe I'll get some insight. I feel like recently at work, there have been a lot of incidents with parents flying off the handle at what feel like relatively minor things. Obviously, sometimes students go home and misrepresent things, but even so.
Most recent example. I teach an A-level science, people probably know about the practical endorsements and requirements for some sciences to do X amount of fieldwork and so on. A Y12 student missed some essential practical work needed for the course, they were offered a chance to catch up with a different class, which they agreed they would do. They then didn't attend this (they were in school on this day, so not like they were unwell).
We run a "practical catch up week" at the end of Y12, so I send a generic email to the parent and student written by our HoD explaining X would need to attend, and why it's important they attend. The response back from the parent is just... aggressive and unreasonable. Apparently the previously offered catch up was the wrong time, and I "pressured" her son into agreeing to this, he feels intimidated by me, I pick on him, etc etc.
Never mind the fact that I'm going out of my way to offer the practical catch ups in my gained time, and that I went out of my way to try to organise him doing the work with the parallel class etc. We obviously have limited lab availability and staff time, and at the moment, my focus has to be on my exam classes, not on Y12.
For some reason, I can deal with rudeness and aggression from students relatively easily, but I find it hard to take from parents.
By the way, nationally, there are over 1200 science teacher jobs going on TES right now.