The fundamental distinction between creation and problem-solving is simple.
In problem-solving we fight to make something we don't like cease to exist. In creation, we imagine what might be and bring it to exist for the first time.
Problems, judgment, criticism, resistance, these things can't occupy the nature of creation. There is no standard upon which to compare. Only experience.
Most of the time though, we work and operate somewhere in the middle. Writer's call it writer's block, the resistance experienced in the creation of pretty much everything.
The struggle is real. The solution is simple. Keep working.