sorry to hear the stress that your cofounder caused. how did you know them before the venture?
cofounder arguments are common, esp in crypto. for your next venture, it's better to have a cofounder agreement with vesting schedule in place. once someone becomes irrational and unreasonable, it's a sign to get lawyers involved.
dont be too hard on yourself, happens to the best of us.
Edit: apparently there have been quite a few successful submissions since. I believe that if you skip a required field, the submit button is disabled - is it possible that was going on here?