Having worked both at startups and large organizations, I can tell that there are two extremes and neither are healthy.
It seems like you got used to the constant crunch time that startups use to burn faster through their usually young human resources. From my experience, noone can sustain that pace without getting burned out or/and (willingly) compromising on their spouses and personal connections outside work.
Looking at the bigger picture you might realize that there are different point of views what progress means. In big corp it's usually about getting rid of/around obstacles, while startups focus on growth, happy VCs and other metrics that mean very little to a big corporate machine that by itself got enough intertia to keep moving even if it doesn't hit those metrics.
Conversely if your current business is running on billable hours. Finishing earlier and providing unrealistic client expectations might activly hurt your employer.