Going to be buried but I think I have been burned out for almost 3 years now. Started with working 80 / 90 hour weeks for 6? months. After that hours got better

Going to be buried but I think I have been burned out for almost 3 years now. Started with working 80 / 90 hour weeks for 6? months. After that hours got better to maybe 50/60 hours a week for 18 months and then new job and back to 90 hour weeks for 4 months. First 2 years of that were in a terrible environment where everyone was stressed and feared being fired. I did not look for a new job because it was double the pay of my last job and I wanted to help set my family up and buy a house. I have trouble focusing on anything for longer than an hour. I have to work in heavy productivity periods of maybe 30 minutes, then I cant do anything for 2 hours. I get good reviews but the current job is pretty easy. I dont think I have really been happy in any aspect of my life for 2+ years. Which sucks, I don't even know what happy is right now, I just exist. Wish I could take a year off and just figure it out but financially not there. Very much burned out. Need to figure out a way to essentially strip everything away to 8 hours of work a day and then just relaxing and family.