As noted before, the reason being told for Daniel Bryan’s release is because of him choking Justin Roberts with his own tie during the NXT invasion angle on RAW.
Word is that someone very important complained to WWE officials about the angle with the idea that kids who were watching may think it’s fun to choke people with their ties. It’s unknown who actually complained but it had to be someone with a lot of power.
Bryan is being described as a scapegoat. WWE does want to bring him back to the roster once the whole thing blows over.