There is a staffroom section - you might get better (more realistic) answers there.
I used to be a secondary school English teacher - it was my 2nd career (or 3rd if you count a few years teaching EFL mainly for the travel opportunities as a separate career).
I only lasted 5 years, mainly because I found the management in secondary schools spectacularly unpleasant. Senior management were massively lacking in people skills, and middle management mainly interested in dumping data collection and admin tasks on those lower down the food chain so that they could then take credit for the results.
The word "initiative" took on a tinge of doom, because there would be a new initiative every 6 months, and half of them contradicted earlier ones which were meant to continue running alongside. Most of them boiled down to nothing more than more paper work and data collection. Any attempt to discuss, question and analyse the usefulness of any "initiatives" would get your card marked as a trouble maker.
The actual teaching was fine, I was prepared for behaviour problems etc and most kids are decent... I wasn't prepared to be patronised and dumped on and expected to be so Stepford about transparently stupid policies which vastly increased my workload.
There was also a ridiculous presentee culture at the "good" school I worked at (which was not the case at the more challenging but improving school). Due to traffic on my commute and wanting to "work smart" and later to having a child, I preferred to get into work as early as the building was open, and to leave relatively early (taking work home of course), but there was a massive amount of sneering and disapproval for leaving before 5pm regardless of the fact I'd been in school working since 7am and the people sneering about me leaving at 4pm on days without meetings scheduled had rolled up to school at 8.30am... My head of department told me I should keep the same hours as her "in case" she needed to talk to me at 4.30pm, and didn't appreciate me suggesting she could tell me earlier in the day if she needed me to stay, as leaving at 5pm added an hour to my commute, whereas coming in for 7am and leaving at 4pm to carry on working at home was a much more efficient use of time.
There is a much bigger marking work load in secondary English than most other subjects IMO simply due to the fact you almost never have simple right or wrong answers and there is such a volume.
I certainly felt less valued, and was less well paid, as a UK secondary school teacher than in the lowly office manager role I did before hand.