Trouble with my wrist hinge/right elbow tuck on the backswing

So I don't know what it is, but as of late, my swing has completely fallen apart. I'm a fairly new golfer (3rd year) and roughly a 20 handicap. I'm struggling heavily with my back swing. I can feel myself taking the club way too far back and getting completely off plain. I seem to be able to control this on the range, and hit fairly solid shots, but when I'm on the course, I don't know what it is, but I take the club way too far back to the point where I can see the club head on the other side of my head.

I'm pretty certain that my right elbow is completely detaching from my body when I do this, and that's causing the terrible shots (I'm a right handed golfer). I've been focusing on keeping my right elbow tucked in throughout the swing, and although it helps a little, I'm still not hitting consistent, crisp shots.

One thing that has helped me on my downswing, is making sure my right elbow is touching or in front of my right hip which causes me to hit from the inside, and I've definitely seen improvement when I do that. However, now I have so many things in my head regarding my poor backswing, that 75% of my shots are just awful. Poor contact, no distance, no ball flight. Just awful muffs, pulls, hooks, you name it.

Any advice how to stay connect through the entire swing, keeping that right elbow tucked in, not swinging too far back, or anything else you think I should know? Please help!

Think about keeping your elbows close together throughout the swing. Another forum member said it first so I can't take credit, but I can say that it's helped me immensely. That should help your separation problem.

When the club is at waste high on my back swing, I feel that is when and where everything falls apart for me. I take the club back with my shoulders, and arms in synch to waste high level, and then I either hinge my wrists way too much which causes the excessive back swing, and the disconnection with my right elbow. I was recently told to simply bend my right arm when the club is at waste high level, and that will keep me connected, but I find that I don't get nearly enough distance when I do that, most likely because there's little to no wrist hinge when I do that.

Bending the right arm is the feeling you want just progressively hinge the wrists. Then keep them supple. Down swing with your hands close to the body. Swing smooth nt hard.