It is not "most disliked", it is "least appeal." They took made a list of athletes that had name recognition among 10% of those polled. Then they had them vote based on appeal. Te'o came in 2nd to last.
This isn't suprising if you consider that most people who responded to the poll probably only know Te'o from the RT hoax. They probably don't actively dislike him, but it's hard to associate any kind of appeal to him if you didn't know him before January 7th.