Just a note
Not all FO's at the Regionals are 300 hour wonders. FO here with 14 years of experience many many types of aircraft and a lot of Turbine time before even starting at the Regional................still learning........will always be.
We all have different backgrounds and this industry is a complex one.
You never know who you will find with you in the cockpit.
The best Captains are the humble ones that recognize they are still learning (and are interested in learning even from an FO) and will do so as long as they fly.
I have flown with an aviation historical pilot and he was the most humble one I ever known.
They also have to be interested in being role model and mentor for the FO as FOs are Captains in training.
A worthless Captain is one that cannot give or teach anything, thinks he is ready and knows it all or have so bad habits that the FO has to Ignore the way he does things just not to fall into the same pattern.
Bad attitude sticks to both groups.
Captains save FOs mistakes and FOs save Captains mistakes. That why we are two in the cockpit.