I had a 980F 4w, 17°, and I got to where I couldn't hit it either.
So now, I hit my 18° Exotics 5 wood or my 20° Nickent 3hybrid off the deck and I'll just have to be happy with that.
I'm in my 4th year of playing golf, and my swing is still something that changes every day. Usually not for the better.