You step one foot off the path, and the pyramid means there's a zillion people in line clamoring to take your place, your old spot is already gone, already filled.
Its like asking how you become a pro football quarterback if you're starting in your 30s. That's easy, you don't.
You CAN however, have an enjoyable and successful career and happy life doing something else. Just not on the old path. Which wasn't working for you anyway, so you're not losing much.
> I spent years running around like a headless chicken to satisfy sales-type execs who had no interest in leveling me up.
I got bad news for you if you think hopping from a startup to a megacorp will avoid that, LOL. Its kind of like travel, where you eventually learn its the same everywhere and you can't run away from yourself.