i don't think that Joe was so bad tonight, considering that Shogun was having problems finishing Vera. The dude isn't even a top ten fighter. fight metric has them basically even in significant strikes.
other sports are almost as bad. the Olympic coverage is horribly one sided for example.most major sports have commentators for each team, and it is clear they are cheering for the home team. quick google search has no trouble finding lists of the most biased announcers ever.