Try getting some (more?) Jump-seat flights as Observer...............
Many airlines use this as a (pre-) line training tool and it WORKS! That way you're not directly involved in the flight but can see what's going on, can anticipate "what comes next" and compare it to your own operation. You MIGHT also see, things you don't like so much............... bad CRM, slack procedures, etc, but it all goes into the Experience Bank and will help you progress.
Best of luck; as others have said, DON'T give up, try work it out with the Training Dept, maybe with some suggestions as have been made...........