If you can not only survive at Google but slack along well enough to get promoted once on "10% of your mental capacity" I'd stay right where you are. You aren't going to find a better place to earn money for equivalent effort and it sounds like you've already adapted to the ecosystem. Sounds like you need an interesting side project or just a meaningful hobby. Don't go looking for the missing sense of fulfillment you…
Second this. Keep slacking at Google. Unless you're ridiculously underpaid -- with a six year tenure -- you're probably in the top 2% in terms of income. You've probably got refreshers that have inflated in value quite handsomely. You're not going to find a better yielding security than your job. Find something better to do with your time. Figure out what your goals are. Whatever they are, you have the resources. Mak…
When you don't have resources, you do have excuses. Oh, I can't do X, Y, and Z because I don't have the time or money or this or that.
Once you have enough money, there's a certain point where you run out of excuses. It's a little uncomfortable. But it's literally the best first world problem you can ask for.