I think the sentiment is accurate even if not precisely correct. Manchin was the classic blue dog Dem. They are becoming less and less common. And failing to eliminate the filibuster is, IMHO, malpractice that has opened the door to a potential Trump adminstration who WILL eliminate the filibuster if they have the numbers in the Senate. And that wouild be nothing short of a disaster. Senate Republicans have already shown a willingness to violate their constitutional mandate for partisan politics. If Trump is charge, God help us all.
As for Paul Ryan, well, HE is the one being punished for not being idealogically pure. There has been no party in the last 100 years that has demanded the blind fealty of the current Republican party.