You close your computer after you put in 40 hours a week and go home. You try your best to communicate in trade offs between time, budget and requirements and if that doesn’t work and you get fired for refusing to be overworked, why do you care?
I’ve been working for 30 years from startups, to boring enterprise companies, to BigTech and now working as a staff consultant for a third party cloud consulting company. Never once have I experienced burn out. Not because I’m special, I’m disciplined enough to say “no”, have savings (nowhere near what you have), and I’m always prepared to get another job - yes during the dot com bust, the 2008 recession and twice since 2023.
I’m not in a position where I don’t have to work. But I am in a position where I can say no to bullshit - being overworked, mistreated, being forced to return to office, say “no” to high pressure BigTech opportunities, etc.
In your position? I would travel (well I do that a lot now including nomadding), enjoy life, work for a risky startup that will probably under pay you but you might enjoy it and worse case you can walk away, volunteer, etc