So it sounds like the contact is the problem.
You talk about long swings, knees and hips going backwards, reverse pivot and something about a skipping rope.
What I would suggest is you forget all the stuff that doesn't affect the ball.
There are lots of golfers out there with wonky swings that still hit it well because they are pretty good AT IMPACT.
Stop worrying about the stuff that doesn't matter and focus on getting the club back to the ball facing the right direction.
To help, try this.
To improve the contact, try and stay close to the ball throughout the swing.If it's a direction problem, check your grip first (although there may be a swing path issue there as well)
If I could forget all the stuff that doesn't matter I wouldn't have a problem. It's because my brain has taken this off the scale, that I can physically barely hit the damn thing. It's things like seeing the clubhead in my peripheral vision at the top of the backswing which is telling me I've gone wrong, and am bound to hit a bad shot - it's not there in the practice swing, I can feel perfect then, but as soon as I overswing, everything goes to pot.
What do you mean by staying close to the ball throughout the swing?