I bailed out of one company because even though the stack seemed conceptually simple in terms of infra (there wasn't a great deal to it), the engineering more than compensated for it. The end result was the same: non-stop crisis management, non-stop firefighting, no capacity to work on anything new, just fixing old.

All by design, really, because at that point you're not part of an engineering team you're a code monkey operating in service of growth metrics.