I see this happening all the time. It’s like startups are a breeding ground for mental health issues (for the exact reasons you outline). One thing I emphasize in my practice is work/life balance and slowing down. It is a hard sell. But research suggests that less is more. After 50hrs/week our work productivity generally has diminishing returns (“But that’s still some return” they will argue!). Burnout, stress, and depression are the biggest productivity killers! So much of what nourishes us as human beings happens on a different speed than productivity mode and we need to make time for that.