That was an extremely hurtful thing that the person said about you and your position. I’m not sure if the commenter was aiming at you being a female, but I do see a low blow targeted at your choice in degrees and quite possibly your age. The person may be feeling a little surprised and possibly ashamed that he/she hasn’t accomplished as much as you have and at your age.
Here’s the thing: It’s okay to stop going to college. College is an option, and it’s okay to decide that this REALLY EXPENSIVE program just isn’t working for you. “Dropout” is a really shitty term to use when someone decides to stop going to college. You don’t call someone a “drop out” when they leave a supermarket cashier job. You don’t call someone a “drop out” or a “quitter” when they get out of a bad relationship. A person moves on from a thing and looks for something better— end of story.
As for the last comment, from Drake, which claims that a person like you could never lead a technical team, I see it as a mark of a butthurt employee with poor people skills. Being a CTO is much more about how you handle relationships with clients and coworkers than your ability to win hackathons for revolutionary code. The mark of being a leader is often being humble enough to hire people who are smarter than you. The last commenter would probably be a terrible fit for a leader if they believe skill is all it takes to be an effective and amiable leader.
Hold your head up high. You’re probably a CTO because you worked your ass off for it.