Ground has certainly earned the right to say whatever he wants to. But, as others have pointed out it seems like he has no gratitude at all for his time in NE which was a key part of making him famous, wealthy and a future HoFer. Even if he hated every minute, one would think he owes the organization better than the constant whining and complaining.
Poor Gronk, he had to work very hard and there were no pony rides or ice cream the day after games. Maybe Bill did not stroke his ego enough.
His comments also really hurt the organization in terms of attracting potential free agents and trades. He is a physically big guy, but would like to see him have more generosity of spirit....even if he hates BB.
THe truth is however that this is how the modern athlete thinks and BB may actually be a bit of a dinosaur in terms of player interactions