If you're struggling to the extent that you're questioning your sanity, you're trying to do too much. There's a limit to what a single person can do.
If you want to stay a one-person company and keep your sanity, do less. Otherwise, figure out how to hire employees. But in this case, it's going to be a long journey still.
If you want to stay a one-person company and keep your sanity, do less. Otherwise, figure out how to hire employees. But in this case, it's going to be a long journey still.