Unless your industry is literally 5 college-buddies, I am not sure how it can be a high-risk career move given where you are. For my 2c, you should talk to the

Unless your industry is literally 5 college-buddies, I am not sure how it can be a high-risk career move given where you are. For my 2c, you should talk to the CTO - this is the person who will make/break the organizational tone. If they tell you to pound sand, so what? You tried to voice concerns, and they ignored you (it would have been worse to stay). You scrub it from the ol' resume, and move on. The other branch is that they set expectations firmly with this person, and your life improves. I genuinely don't think there is risk either way in your position if I am honest.