He beat up on weaker teams in college. It happens all the time. By the way, what exactly did he win in college?
As a starter he went 13-10 in the SEC, and he went 4-11 against top 25 competition. They never won the SEC West, not to mention the SEC Championship itself.
He had a great 2 game run to get to number 1. Then MSU beat a 5-7 Kentucky team, a 6-7 Arkansas team, and Non-Major Tennessee-Martin (??) team. Following that they folded and lost 3 of 4 games all to teams ranked but ranked below MSU.
Tim Tebow won a state championship in high school, won two college national championships, and went 7-4 and won a playoff game in his second season with Denver. Does that make him a great quarterback?
Yes, you are what you are in some senses. However, sometime how you got where you are is just as important (if not more so).
Good kid, but the reports on him before the draft were and, unfortunately, still are accurate. Like I said I root for him, and hope he and those around him are able to help him improve, but right now he is what he is (and was before we drafted him).