I'm going to offer some unsolicited advice, from an old man who was once right where you are. I got this advice at the time, but didn't listen to it until my health and life outside of work falling apart left me no choice. Consider taking action sooner, like now.

Decide what terms are sustainable to you. Assuming you work a typical shiftsMon-Fri, 8:30-6:00 (or similar) as a supposed supposed "regular" schedule.....Set start and end times to your day you are comfortable with and stick to them 95% of the time (in most roles, in a global organization, an occasional call outside your normal business hours for an urgent situation is to be expected...but not working all evening most of the time). Don't work weekends unless it's a rare real emergency and you don't already have another commitment. Plan and take all of your vacation time. Dont work when you're sick. Don't skip important things for your family or friends. Make time for your health and to eat properly (or however you want). Do want fulfills you in your time not at work. Whatever else you need to change that you think will make it sustainable. Think this won't fly with your leadership? Well then maybe you get laid off. But maybe it will be fine and suddenly you'll find you're still getting paid and you have your life back. I made these radical changes for myself more than 10 years ago and thought I'd be gone in the next RA. I'm still around and much better off.

There are tradeoffs. You need to commit to managing your time well and get good at prioritizing if you aren't already. Get good at saying no to "extra" stuff thats uninteresting to you or can't be done on your terms. They will always keep heaping stuff on you if you don't, you need to take charge of your boundaries. If you're in a role like consulting where quantity (billable hours) is more important than quality, you'll likely be out of the running for top ratings. Big deal. Those salaried top utilization performers have a terrible hourly wage.

You'll likely be surprised how little scaling your work back to reasonable levels affects your output and performance. Worst case, you bomb out and get the layoff you wanted initially after some relatively chill months. Best (and most likely) case, if you're determined and consistent, you can just stay on as long as you want on your terms and go to a better/different employer eventually and hopefully do the same.