I agree. Some instructors suck, that's why they are instructors and not line pilots. Go to his boss and complain. If you get enough pilots complaining about bad instructors; they will remove them. Go to your union. They have professional standards and training comittees. Use them. I've complained about instructors and I know of one who was removed from the training department. I'd even walk out of an oral or sim session with a bad instructor. Of course, if you are new and on probation, that could change things. It's tough to put your job on the line over some idiot. My new hire instructor at Continental Express was a complete idiot, but I put up with him. Now I don't/won't.

About the sim stuff; it gets easier over time. You learn to "fly" the box and get through it. Don't beat yourself up over this. Pilots fly airplanes, and no sim is an airplane.