The good news: I avoided most of the insanity. A nest egg, a paid-off house (no mortgage for 6 years), my wife & dogs, my health, and the ability to occasionally travel for pleasure. We put away ~25% of our earnings every month. I go to the gym 4-5 times per week and sweat my ass off.
I've seen more than my share of layoffs so I spend every bleeping moment learning other technologies. I won't be able to call myself a full-stack dev or a data scientist, but I know enough to get the simple stuff done. It will keep me in coffee and banh mi sandwiches when I tell my employer to stuff it.
As for "work fast and break things" culture: I know that 90% of this is fueled by the media. Don't buy the hype. Just be a good human being and ensure that your salary > costs.
I'm rapidly approaching the day that I won't have to wake up and read YC's bullshit. I'll be on a mountainside with my dogs and my wife. Good effing riddance.