Actually, to most people he NAILED the part. You may not have liked his work much, but the fact is that to a lot of people he did a great job with the story and material he was given to work with. It's NOT his fault there was no sequel, there were other factors at work, especially Bryan Singer.
Brandon won awards for his work in SR such as:
Superman Returns Tops Saturn Awards, including Best Actor for Brandon.
http://www.supermanhomepage.com/news/2007-news/2007-news-movie.php?topic=2007-news-movie/0511
Best Superhero- Spike TV's Scream Awards Awards 2006 (beating up contenders like Jackman and Bale)
http://www.movieweb.com/news/NEIwlILJAWBSNI
Empire Award 2007 for Best Male Newcomer
http://www.empireonline.com/awards/malenewcomer.asp
Link to pic:
http://photogallery.indiatimes.com/...Brandon-Routh/photo/2582835/Brandon-Routh.jpg
And sorry but this 'too much negative baggage' is a myth among online fanboys. Yes, many people expected a different approach with this film, but a lot of people also loved the film as it is. General audiences just wanted MORE action. I don't really think there was a need for a reboot, but I don't make the calls so...