Assuming you like the job enough and wants to continue working (which seems to be the case): 1) Reflect on your ability to change and influence your work envir

Assuming you like the job enough and wants to continue working (which seems to be the case): 1) Reflect on your ability to change and influence your work environment. You probably can influence the company a lot more than you think. Don't play the victim card; roll up your sleeves and start building the culture you want to work in. If you're a co-founder, that's your job anyway. If you're an early employee, you have the credibility and visibility, and people will follow your lead. 2) Establish well-being as one of your core values. Given you already had an exit, I'd imagine you're past the ramen-profitable stage, so your focus now should be on scaling fast, and building a sustainable long-term strategy. Long work hours, burnout and a toxic environment are sure ways to crash a company. 3) Give yourself a deadline, and work your ass off till then. If you're proud of the work you did to help turn things around and still wasn't able to make a dent, then it's time to move on, and with your head up. If you can't change how the company operates, you can always change who do you work for. OTOH, if you don't love the job enough, OR if you don't have the energy to do #1 and #2, then I'd suggest you quit or take an unpaid leave of absence, and use the time to disconnect and recharge. You have plenty of runway, so you can afford to take a sabbatical. If you want to keep yourself intellectually challenged you may want to go back to school or something (given travelling the world is unfortunately not an option right now). Last, but most important of all: seek help. Don't underestimate the impact of burnout, and assume it'll go away one day. It's serious, and may have long-lasting impact if you don't pay attention, and address the root-cause. Nothing is more important than your mental health. Feel free to ping me if you need a stranger to chat.