Every bit of innovation in the AI space today originated at Google. The company poured probably tens of billions into its Brain division, sponsored and made public every bit of research, and pretty much created the field of modern AI. So what was the outcome? When the employees realized they had struck gold they figured they'd rather go join startups or found their own companies instead, because regardless of the amount of success they achieved at Google they would never 1000x the share price or be the ones calling the shots.

This example is the perfect microcosm of the economics of innovation at large companies. Google/Microsoft/Apple/Amazon and the like have zero incentive to continue to be the companies they were 20 years ago. They don't need to take risks. They don't need to disrupt anything. They instead need leaders like Pichai who will keep the ship steady and keep the shareholders happy, and will keep investing in or purchasing smaller companies that are either a threat or an opportunity for growth, all while keeping their existing revenue streams flowing.

If as an employee you are nostalgic about the "culture" in the early days of such a company then you should realize that it is not coming back, just like the carefree days of your own childhood aren't coming back. Quit and join a smaller company instead.