What you have to do now is to find your self-confidence. Don't care what others say, but you should know how hard you should work and where your shortcomings are. Make up for it by hard work and study. You know, there is a company sales king in Japan. At first, he was also seriously inferior, because he stuttered so badly that many people laughed at him. But he practices how to speak a fluent sentence every day at home. When he goes to see a client, he has to practice in the toilet for half an hour. Finally, through his own efforts, he not only got rid of the stuttering problem, but also became the sales king of this company.
I was born to be useful. Everyone has his own advantages and disadvantages. I suggest you be careful in everything you do from now on. Now that you have started your own business, do what you are good at well, make features, and see if anyone will laugh at you again.
Remember, only self-confidence can make you self-reliant, and only self-reliance can make you self-reliant!