How do Storyline beginners overcomplicate course building?

I have seen not only the 'layer in place of a slide' issue but I've also seen entire courses built on just one slide! That one used show/hide triggers based on timeline cues to progress through the course. It made it extremely difficult to work with because there were so many text boxes sitting on top of each other that you couldn't actually see anything.

In true Instructional Designer fashion, I think the issue is training. That author of my above example was completely self-taught and (obviously) found the software to be complex and difficult to use. Storyline is a software that is very flexible and has many ways to achieve the same outcome, which can be overwhelming and confusing when you're getting started.

I have been training new staff to use Storyline lately, however, and have covered many of your points in our sessions. They haven't had anywhere near the same resistance to the software because they have been shown best practices for using it along the way.

Please correct me if I'm wrong but there's no tutorial when you first load the product. Even a simple tour of the interface would help with many of the obstacles beginners face.