This is my desperate call for help, I've been working at this company non-stop for 11 months now, it's been an endless cycle of working on projects round the clock.

I enjoyed the job at first, especially, been the founding backend developer on the team, however, recently, it has taken a toll on me as I have endlessly and tirelessly worked on a variety of projects simultaneously over the months, which is bad in my own perspective. The product managers only want to see projects completed without taking into consideration the technical details.

Now, here's my big question
How do you cope as a burnt out developer that still needs to deliver on projects? I need answers, hopefully, I'll get some inspiration from here.