Your friends and family won't judge you poorly for this. Don't worry.
Early in my career I lost a job at a startup and it also shook me up. I say "lost" because I asked if I was fired or laid off and they said I could call it whatever I wanted lol.
But yeah, basically, the head of the company had an inhuman work ethic and expected the same from his employees. I got in trouble for leaving work at 10pm on a Friday. I got in trouble for coming in late on the weekend because I was doing laundry. I got in trouble for spending time with my friends on my birthday (on a Saturday).
Basically, startups can be extremely unprofessional so if you get fired by a startup, it's no big deal.