The Star Wars prequels suck. Boring premises, bad scripts, confusing plots, uninteresting motives, and nonexistent character development. But, as this dude explains in this video, they could have been great movies with some very specific changes.
If you watch the two videos, you will see he's right. They could have worked perfectly fine with these changes. And make sense! It's all about building the characters who drive the action. They teach this in Movie Making 101, but many directors—like George Lucas—seem to don't give a fuck as they get old.