I think some folk have been in the job too long, should have got out, had no chance to do so...
Some haven't realised that they are genuinely vile!
I still feel angry now at my secondary maths teacher, she was horrible to me, because she'd been in the job so long she thought she knew everything about everyone.
She berated me every time I had to leave her lesson for a music lesson or arrived late due to a music lesson - not MY fault at 12 to 15 years of age that the school arranged one to one music lessons that would occur extra to the timetabled lessons.
When I asked for help to understand, she would again berate me for the music lessons (which took up no more than 20 minutes of one double period out of a total of five periods of maths (two doubles and one single in a week), even when I had been present for the introduction of a topic and had missed nothing at all.
She'd routinely leave me floundering not understanding something and move on to the next topic, again asking for help would just get me abuse.
I asked if I could change sets... I was in set 1, the top set for maths, achieving a's and b's the year before, she smugly told me that'd do me no good as she taught both set 1 and set 2 together, and set 3 was full....so my only option was to join set 4, as she called it 'the thickies set' (yep, she really did)...
I walked out, went to set 4s classroom and asked if I could join them, was welcomed in and never abused for having a music lesson again.
Ok I only got a C at GCSE for maths because set 4 were all entered for the lower tier paper, but frankly had I stayed in the top set, failing and being ignored and abused, I'd have failed maths entirely.
I am still angry at her, at that age I was struggling with my parents nasty divorce, my mothers raging alcoholism, my sister being dx ADHD and frankly fucking violent, something as head of year this teacher knew all about, but she decided I was lazy, rather than the truth, a teenager who did not find maths natural at all, working her backside off asking for help throughout some pretty nasty stuff.
She even hurled abuse at me the day I was called into the headmaster office out of her lesson 'slacking off AGAIN are you, what excuse is it THIS time'... well the excuse was my mother had collapsed at work and been taken to hospital in a coma, and I was going into temp foster care.... When I returned to the class having been told this, I got as far as 'My mums been taken to hospital in a coma' and she cut me off 'I don't want to hear it, sit down'...
I'd still like to slap the bitch into next week!