Plain old bar charts might be boring, but they would have more clearly communicated the message without all the extra distractions. They would also allow the graphic to use fewer code and require fewer text (legends could be omitted). At least they did specific actual graph values in the graphs. The area graph shows how one color can be effective when the graph contains only one type of data element.
Lesson here is to think carefully and make conscious choices about how you communicate your message. It's true in pitching an investor, pitching a customer, or presenting to an audience. Make sure your message gets through. Otherwise you just have a bunch of graphs dropped on a page and the reader has to search for what you're trying to say.
Also, hire a designer. You'll be happier.