I see no problem with telling them why the switch.
He told them that much. He didn’t have to tell them that.
If he teals them why, say the other provider has a network Comcast doesn’t, he may make a more competitive landscape.
Me, I cancelled in 1994.
Never had it since, don’t need it, don’t want it.
Nasty vile stuff on most of the channels.
And I am sure the harassment you describe is 100% true.
These huge corps can make money that way, extra bills they know are wrong etc...