[marcinzm]

Large tech companies, your profile says you're at Google, have fairly different dynamics than other companies. And most engineers do not work at FAANG. Many people join them explicitly for the money, especially nowadays, and so you're filtering at the onset for employees who follow money above other things. So it's not surprising they leave for more money. There's also generally a decent work culture so changing managers may actually improve things. The company is also large enough to have many managers and divisions with different approaches.

My experience at startups has been that people mostly leave because of management or business collapse.