This post resonates with me. I recently join a big organisation and a team owning such a system. The oncalls are very stressful to me. Our systems aren't that robust and we don't have control on all the dependencies. So things fail all the time. At the same time, management is consistently pushing for new features. As a consequence, work life balance is bad, turnover is high.

My hope is that I'll learn to manage the stress and gain more expertise.