I dont really care for the prequels at all. RoTS might not be the worst of them but still its pretty bad.
For one, the audience never really connects with Anakin. Lucas made the prequels to be a character story about Anakin Skywalker but we miss out on the most important parts of his life like his Jedi training and his relationship with Obi-wan. Everything is just slightly mentioned and we just have to assume thats what happened. Obi-wan spoke very highly of Anakin Skywalker calling him a "Good friend" and a wise and powerful jedi. But instead it seems like Anakin was just some punk that kills kids, complains and pisses off Obi most of the time. Doesn't really seem like "Good Friend" material.
The whole entire fight scene at the end was just boring because we dont care for the characters. The scene lasted 30 mins to long and the CGI was just overkill. Obi-wan ultimately won because he "Had the high ground", but what happened when Darth maul had the high ground?
but thats just me i guess.