Dio,
I am not sure that you understand the modern flight deck operation...
No " the First Officer is not there to stop Captains from ....ing it up for all of us " and the Captains are not there to stop First Officer from ....ing for all of them either.
Today you have two flight crews with different level of experience on the flight deck to manage the flight , one has the final authority ( the commander ) and the other trying ( most of the time ) to get more experience to be ready for the upgrade on the left.
Appart from that it is two qualified pilots , one acting as pilot flying and the other as pilot monitoring to support the pilot flying and the roles are reversed on the next sector.
I hope you will understand that as it is the only way to fly safe.
It is not ( anymore ) one boss and a slave , people with that state of mind should be banned from any flight deck ( both sides , Captain and First Officer )