BigCo isn't fratty at all in my limited experience. Be professional, follow whatever 10 commandments the C-suite prints out & laminates for you, and sell yourself once a year in self-review and you'll win out and barely work if you're remote.

Smaller companies have very little org-chart structure - it's a single small tree. There's no equilibrium in the org chart. So a couple bad actors can easily ruin it all. And they did at every startup I was at.

My play is to collect checks and eventually make art with my computer science experience for the rest of my life.