I’m so sorry for your experience and sympathize with you. I know exactly what you mean. After a TKR of left knee in 2018’ my quality of life got worse not better. It never felt right to me in spite of X-rays showing “nothing wrong” according to the original surgeon. I went from 35 degrees flexion before manipulation to no more than 20 degrees afterwards! I was in pain & dragged that cement block around for years. After 4 years of self-rehabing while searching for answers, and talking with others surgeons, I finally found an ortho surgeon who had a diagnosis for my issues on my first consult with him. He ordered several tests including a scan that confirmed his diagnosis - that my implant was loose, and defective, and the wrong size on top of that. That was Oct of 22’…he did say since this was 3rd surgery on this same knee (I too had meniscus repair in 2017’) that he could not guarantee I’d get to 120 degrees of flexion. He performed revision TKR in Nov 22’ and noted that it took him an extra hour just to cut out/through the scar tissue. I had PT daily for a month, then 3 x week for 2 more months to keep scar tissue from developing again. Today I’m at 90 degrees and I consider that a win! I’m able to walk stairs normally, sit in a car normally, get on/off toilet normally, ride my exercise bike & walk 2.5 miles total to/from aquatic fitness class - 5 days a week. No more cement brick! So - there is hope. Don’t listen to those who had wonderful outcomes and insinuate you are not doing what your supposed to. Everybody is different, every outcome is different and there’s a reason for your issues. Don’t give up hope, keep the faith and best of luck with your upcoming procedure.