I moved from a job that was totally suitable to my level of education, it challenged me, I got to use skills I acquired in my degree and I worked with nice people. It wasn't the best paying job in the world (in my area it was as good as it was going to get without further courses etc which the company didn't offer etc) but it was enough and I liked it.
A new manager was hired and proceeded to throw her weight around, took an instant dislike to me (genuinely no clue why) and made life extremely difficult for me after I had some time off for surgery for an ectopic pregnancy. She threatened me with disciplinary action, wasn't available to take calls and then tried to punish me because she hadn't been available for me to contact, so I left messages with reception, and apparently that was unacceptable.
All my other managers were incredibly supportive and understanding but she was just awful about it, I was hugely stressed and couldn't cope any more as she was my direct boss so I handed in my resignation and served my notice under sick leave for stress because I couldn't handle the thought of another day near her. She clearly was trying to force me out, and if I hadn't gone this way I'm sure she would have found a way to make them let me go. I made sure the resignation letter to the general manager contained details of all her unprofessional behaviour but in a calm rational manner, not an insane rant like this lol.
Since leaving I've heard from other employees that this behaviour has continued towards others so I'm sad for them, but glad I wasn't just me and it wasn't all in my head because I know stress can amplify those feelings.
I've started working for a new company, it's more physical and less mentally taxing and I'm hugely overqualified for it but the physical labour helps me forget about my loss, (I've also had a miscarriage as well as the ectopic in this time) as I'm too busy and tired to spend much time dwelling on it which is helping massively. The pay is about the same, but the company are really good and they help you progress if you are capable. They were great about my miscarriage, I didn't take any time off except the day I was in hospital having it and they were really understanding that I had a few physical limitations on returning to work (the job is a bit of a mans world, I'm the only female employee, lady stuff doesn't always go over too well!!).
I'm so much happier, it isn't for everyone, luckily I have a supportive husband who understood my need to get out of a toxic environment for my own sanity and happiness. We are both happier now despite everything, as I'm coping with it much better now I don't have that pressure from work.
It's true when they say money can't buy happiness, we have money stresses like most people but at least I left and made that choice rather than stayed and faced misery for that paycheque not knowing if she might fire me anyway and we would be without it and without a reference I could use. They gave me a shitty reference anyway, apparently needing surgery qualifies as having 'attendance issues' even with a valid doctors note.
Good luck. Be happy.