ma, you are right on about captains that are weak. Their window is very narrow. I hated flying with them or with the ultra egos so swore I would never do it when I got in the left seat. We were a small airline flying 737's with pilots expected to be captains in a few years so all had experience and it was a small fun flying club. Everybody knew how to fly jets when hired.
Then we got bought by the mega airline everything was different. The mega airline FO's prefered flying with us because it was such an easy day. Just fly and enjoy the job. No BS.
We figured out how to make the mega airline job fun too.