Based on what you have said, I think that you may want to try to change your position at the company. If the company is growing quickly then there are probably

Based on what you have said, I think that you may want to try to change your position at the company. If the company is growing quickly then there are probably positions in the company that will exist soon or were just made that can provide you with very useful skills and knowledge. You may be able to do other things during the day instead of coding, which will probably reduce the amount that your work is taxing you, allowing you to work on side projects more. You may not want to move into a role with responsibilities that aren't programming but as others have said the knowledge and experience you gain during growth is crucial to success, which you will learn even if the company doesn't execute well. It will also help you know what qualities you would like in a co-founder,if you want one, or how you should approach starting something of your own.