During a close intense game, in which the outcome is in question or it's almost certain your team will lose, any comment by someone in the booth will seem derogatory, like they are just picking on you and your team. Furthermore, the refs suck, the commercials are terrible and the next family member that walks in front of the TV during a play is going pay the consequences.
Having said that, there was open hostility by some ex-players turned TV analysts in the past, not all of them tried to take the high road like Troy Aikman. And I'll say it, the Dallas Cowboys are grossly underrepresented in the Hall of Fame. But hey, it came with the territory of claiming to be "America's team" and when your team wins championships, it is at the cost of every other team losing in the playoffs at some point. You bet there are some resentment and it's impossible to be 100% professional 100% of the time.
Overall, it's no big deal, and today it is a non-issue, it's mostly we fans being temperamental and oversensitive during a stressful, critical game. Fans of every team believe they are getting screwed one way or another.