This is my story of internship

One of my friends invited me to join a startup company to do an internship.
At that time, I was easily swept away by the opinions of others and did not insist on my opinions and also I had never had business experience in my life so I was excited to do this. However, at the end of the day, I realized that I had no ability to identify between good people and bad people.

The CEO told me that we are the team and if I contribute to the team and make profits we will share the profits. What he suggested to me was to get 30% of sales profit with a complete performance reward and asked me to work very hard. At that time, I thought this way of working was super cool.
Even though I was not a full-time employee, I worked 24 hours a day for 365 days, a year and lived with the CEO at that time. While knowing nothing of business, there are no customers, no websites, no know-how, no company performance at first. Everything started from ZERO. My basic salary was “0” JPY and I used all of my time to get customers so I ran out of money and even got into more than 1 million JPY debt.
Due to my efforts, eventually, I received 4 orders to make websites for customers and I made profits to the company! I thought I could pay my debt back and live again. But the pay was little to me so I despaired at working and eventually, I'm depressed.
Later on, it turned out that the CEO put 95% of the profits into his pockets.
At the moment I realized the fact, I decided to quit and noticed that I was brainwashed by the CEO.
Many of the clients followed me even after I left the company so I decided to become a freelance to support these clients.
Through this experience, I gained skills such as sales, website creation etc. and also I learned important lessons, that is, to have my own opinion and confidence and to identify giver and taker. Also I realized the warmth of people. Many of my friends and parents and clients helped me a lot while I was depressed.
In conclusion, it was a good experience.