"Instead, I'm on a team that has and horrendous turnover and is staffed with below-average IQ people." "This company builds EVERYTHING in house, and the toolset is like going backwards in my career 10 years."

I am guessing this is either Amazon or Google. I would think that this is most likely Amazon ("horrendous turnover": 50% of people who join Amazon leave within the first 2 years). In LinkedIn you will routinely find people from Amazon showing their badges stating that they completed X+ number of years. Have you seen people from other places routinely doing this? That itself is a dead giveaway to the critical eye.

Btw, your IQ comparison is extremely derogatory. So please edit that out.