I work 40 hours a week at maximum - most weeks I work about 34 to 38 hours. You 80 hours a week guys, what the hell are you doing with your time? Are you divorced? No family? No friends? Is 'disrupting' an industry really that important to you?
My name is Rick and I'm a 80 hour a week guy. I'm 26, single, and have no pets. I have a family and friends, but I'm very transparent about my work habits and priorities as a full-stack engineer. Being so young, I see myself as training to be the person I want to be in the future. The best programmers in the world worked at it relentlessly. Sure, there are variances in the amount that they all worked, and some did it…
I did something similar to you. But before I did the change I was burnt out and very depressed (I was at an extremely low point of my life). I don't regret it.
Believe me. Do some creative destruction. And come back in two-three years time.