Yes, I went to a Gulf country to work in sports administration. The job was seasonal and during the 'on' season was 6 x 7 hour days plus 2 x 4-5 hour evenings, so 50+ hours during the week. During off season, it was 5 x 7 hour days so 35 hours. On season / off season were basically six months each, so it averaged out at not too bad and even during the on season I was getting one day off every week.
While I was there, my one weekly day off during the on season turned into a 9 hour workday. I would have months and months with no day off and 60+ hour weeks. Put on loads of weight, became a hermit, hated my life. I was single so luckily didn't impact anyone else but it was horrid and I felt like a different person. Eventually I decided to ignore the empty promises that things would improve, and resigned. Just before actually leaving, I was fraying around the edges and flew off the handle with someone in a professional context, threw a few fucks into them, nothing more than that, but word got round and the incident has overshadowed my professional life and prospects ever since.
The problem is that "I was working 60 hours a week for six months of the year" doesn't sound bad enough to justify me losing my shit with someone, because people imagine five long work days, maybe a bit of extra work taken home on the weekend. They don't imagine months and months without a day off and how that would feel.
I don't know how to relax anymore and friendships have gone through my own lack of input into them. OP, whatever you are going through that has prompted this question, find a way out.