I wouldn't assume that this will be the case.
Unlike elected representatives, legacy media cannot be voted out of office. Liberals will continue to be be liberals until they have a Damascus road experience. The anti-Christian, anti-conservative, anti-American celebrities in legacy media will continue demonizing those they hate - regardless of who holds the majority in Congress.
They will turn on Biden because they would blame him for the loss of both houses. They would make sure he is replaced.