Yes sir on the getting old part.
I had to turn down many rounds of golf with my buddies....these guys are our age but like teenagers would hit me with every demeaning name in the book....you can guess what they were.
Anyway mine was exact same
I'd go from thinking it was getting better to waking up in middle of the night wondering if I needed some kind of surgery.
The brutal part is being an active guy and having to accept the only way it's getting better is to not do the stuff you love doing.
Mines better now back to playing again....once in awhile I feel a little odd weakness but pain free now