Who cares? He doesn’t have to like the QB as a player or person. He just has to report on the team and players. You’d prefer that he likes them, but it isn’t a requirement.
Also, this is a mistake, and not a remark intended for public consumption. It is embarrassing for he and the Browns and the network, but he didn’t do anything wrong unless he is in charge of turning the mics on and off at the appropriate time.
You Browns fans are overly sensitive of your QB because all of the criticism is grounded, and apparent for all to see. Your mistake is believing that you have to be a fan of the player in order to root for your team. You also have the option of changing or backing off of your team allegiance if you find players or the management who keeps employing undesirable players unpalatable. Take a hiatus until Haslem sells.