Now you have two paths:
1. Stay with him. Try to do business well and let the boss get to know you again. But I think this is quite difficult.
2. Find a new job. After all, you have cultural differences with him. He can be said to be very rustic, similar to a "peasant entrepreneur." You have no future in the long run. So you can consider quitting, but don't do it now. As the end of the year approaches, it is hard to find a job. You can make some psychological preparations until after the Spring Festival.
I don't recommend working in a company with some relatives, especially a company run by a private boss. Relationships are hard to handle. Ha ha.