If you still enjoy teaching but it's the school environment you're in that's grinding you down, I'd encourage you to try an independent school first before you decide to leave teaching altogether.
I spent the last 6 years of my teaching career in an independent school as a HoD and member of SLT, and even with that level of additional responsibility and a fairly full teaching timetable, I very rarely had to take work home as I had such small classes and so many free periods that the marking and planning were all possible to do in the school day. School days were longer - lessons ran between 8am and 5pm, and we had to do lunchtime and after school clubs, lots of extracurricular trips in the evenings and so on - but the holidays were longer to compensate, and the pay was excellent - far higher than state. I was free to teach what I wanted and to lead my department as I wanted with very little oversight - we were only observed once a year and I was allowed to create my own subject curriculum. So plenty of benefits.
I left in the end because I was bored - I'd spent too long in one place - and felt like a change. I also hated the restrictions of being a teacher - while everyone else in the world has cottoned on to flexible working, working from home and so on, teaching remains in the dark ages on that front. And while I loved the holidays - and I do miss them now - I didn't love the fact I had no flexibility over when to take them, and could never have a spontaneous long weekend.
I'm working in an arts organisation now in an education role and while I don't feel the same level of fulfilment as I found in teaching, and I really miss the kids, I am loving the flexibility of my days, setting my own schedule, being able to work from home a couple of days a week, eating lunch and taking breaks when I want, and using my brain, skills and subject knowledge in a different way. I don't think I'll do this forever and I may go back to teaching one day, but for now, I'm enjoying a change of pace and direction. I worked in a similar sort of office-based arts organisation job before I became a teacher and got bored of that - and loved teaching when I first started because of how busy and active the days were - so I'm anticipating that moment of ennui with office life will return after a while. But for now it's working for me. I've taken a pay cut - but I was on such a huge salary in my last job, I really couldn't expect to meet that elsewhere unless I went into a corporate role - but I'm happy and can still pay all my bills and enjoy the lifestyle I've always had.
So a couple of perspectives there for you. If you're not quite sure you've had enough yet, try a new school environment. If you feel like a bigger change, take a leap and see what happens. The joy of being a teacher is that it's a skill you never lose, and a profession that will always be there if you want to go back.
Good luck! :)