Wow, even as a recreational athlete(71f) I can understand your feelings. I haven’t had joint replacement, but I’ve struggled through a lot of pain and dysfunction in knees and now a shoulder. (I was told by my gp that rotator cuff arthropathy was a devastating injury and I’d have to radically change the way I work out because the same thing happened to him. Well, I got prp therapy and pt and I’m still weightlifting, though progress is slow and new pains crop up. For me a lot of this is mental; I just will not accept that I can’t lift anymore because I can.)I am stronger than the pain. You are too. Take painkillers if you need to.
You probably already tried pt, but look for a good one in your area who works with your present situation. Also check out the internet for pt’s and trainers who work with your situation.
Also, get another opinion from a surgeon; there may be some revision or adjustment needed.
Finally, 4 weeks doesn’t seem like a whole lot of time for recovery from joint replacement.
Please let us know how it goes; I think I really can feel your pain.