Ouch. Big egos in tech are a cliche to be dispelled whenever possible by contrary example setting and not taking oneself too seriously. I turned down a ~ £ 2.5 million exit to avoid being golden handcuffed to an absolute dick co-founder for 3 years. Sometimes, your sanity is worth more than any amount of superficial or external stuff.

Genuinely cool, reliable peeps with a sense of humor are the best peeps to work with.