I left silicon valley because of agile development. Sprinting all the time was the thing that lead to my burnout, and when we finally released our app, the company was pivoting and 'going epic mode'. I quit then.
In retrospect it would've been fine if I had taken a more relaxed attitude towards it all. Sprints don't mean you have to literally sprint. Epic mode is just a narrative. Work at your pace and it'll be fine.