TheLandscapePainter
You're not alone with this!
This is actually one of the most common things painters struggle with. Both the "ugly" stage of a single painting, as well as the first time of learning to draw seriously, where you have fantastic ideas in your head, but everything looks just terrible, because you don't yet have the skills. The only way to get through this is to go through this.
I'll go through my sketch books and see if I can find something that I did a year ago that is similar to something recent, so you can see how fast you get better once you start to seriously work on your drawing skills.
I'm also actually working on something that will help people transition to this more skill-based way of painting and drawing. It's still in the very early stages, but you'll know when it is done.