1. I agree to work with you on your startup idea because i believe in you.
2. I am the solo developer doing both the mobile apps, website, database and server side.
3.You call me shouting and complaining that i am too slow.

4. sudo rm -rf ~/your_project

5. On his server: sudo rm -rf

That's just fucked up. If he knows how to do it faster, he should just do it himself

Zuckerbase the idea.

Tug life

I'd explicitly tell him to calm the fuck down. In your Position you have a lot of influence and Power. Try to teach him about your work, at least a little bit. It seems to be a technical startup, and the "ceo" Should have Basic knowledge imo.
Either he understands that or like you wrote, remove that shit.