What are the “internal things” that Baker Mayfield referenced?

Article Summary:
Often candid to a fault, Browns quarterback Baker Mayfield opened up a fault line in Cleveland with his comment to NFL Network that there have been “a lot of internal things” along with outside noise.
Second, criticism of Mayfield on the team’s in-house radio show, Cleveland Browns Daily, “Hasn’t always played well” with Mayfield. Per Cabot, the fact that many players supported Odell Beckham Jr. after his father posted a video showing all the times OBJ didn’t get the ball when open “Was hard on Mayfield, and the ordeal took its toll.”
Fourth, there’s been a “Major disconnect” between player and team as to “Messaging” about his injuries.
Fifth, some defensive players “Have been frustrated” with Mayfield’s points production.
