It’s more that they just don’t have good business sense. They can’t make decisions on their own, and so I’m essentially doing their job and mine.

You’re getting caught up in the “I do everything, they do nothing” comparisons. Yes, it’s unfair, yes, you are justified in being annoyed by that. It won’t change your predicament though.

You might balk at this, but since you’re at the cofounder/lead level, you already have the power to make real change. Lead this other person, support them, don’t do their job for them. You likely need to “teach them to fish” so to speak.

There are some tough conversations and boundary setting you likely need to do. It’s going to be hard, because the other party is used to the way things are. If you hang in there, stay patient, and focus on maintaining a positive, growing relationship, to have a good chance of succeeding though.

This weakness you perceive in your peer is an opportunity for growth if you look at it the right way.

Maybe, but this isn’t about growth, it’s about making money. I’m not doing this for my health or the experience, but rather to succeed.

When I refer to growth, I don't mean in terms of the company, or profits, or business success. I mean in terms of your relationship with your colleague.

Most things in life are about relationship management. Without it, the overall endeavour fails.