also backseat driver
(~s)
1.
If you refer to a passenger in a car as a ~, they annoy you because they constantly give you advice.
N-COUNT disapproval
2.
If you refer to someone, especially a politician, as a ~, you disapprove of them because they try to influence a situation that does not concern them.
They accused the former prime minister of being a backseat driver.
N-COUNT disapproval