He was only sloppy when Maldonado was pretty much out of it and he clearly acknowledged his mistake. Rampage would have a hard time in a straight boxing match against Maldonado....
This is MMA, Fabio has taken decent damage in all of his UFC fights. Glover beat him with aggression, not better boxing. Glover is a very powerful bloke.
Rampage thrives on aggression, he has won and lost to it in the past but no one since the Jardine fight has fought a positive fight against him. Fact is, Rampage is HIGHLY skilled but he is a highly emotional fighter. He fights best when he is threatened best.
Rampage can beat Fabio with his fists, and he can do the same to Glover.