[outside1234]

I left Google because I was working on a crank that was attached to a spindle. It was super boring and what I was learning did not accrue to anything that was valuable outside the company.

Otherwise it was a fine place to work. No better than Microsoft or Netflix or the rest, but no worse either.

[Latteland]

That's basically what happened to me. I got bored after a while, working on a small feature on v8 of something. Fixing bugs and not having much testing for my system was a drag. The original leader of my mature product team was good, but he left and then a first time overly confident bro was the leader. We reported issues but new upper level management didn't matter.