Paid to sleep, fly for fun
I haven’t done 121, but from what I hear it’s 1. Lack of experience managing autoflight systems and 2. Shaky basic attitude instrument flyingI've read a lot of posts from 121 pilots that say ifr/instruments are the toughest part of training at the airlines and what washes people out the most often.
What, specifically, causes the most problems and what can one do before getting to 121 training to be as prepared as possible?