@Knitgirl, I'm sorry you've lost a loved one. It's also unfortunate you're dealing with the anxiety your healthcare team is promoting. In addition to missing the class on individual recovery timelines, they must have missed the one on caring for the whole person.
You have the right to refuse the MUA, if recommended by your doctor. As long as you aren't lying around all day eating bon bons, you are working that knee and your ROM will very likely improve (according to NIH studies, ~3-6% of TKA patients develop adhesions that cause decreased range of motion). Visualize trying to bend a garden hose that is on full blast. Now visualize bending the same garden hose when the water is turned off. It's more likely, at this point in your recovery, that swelling is causing your decreased flexion, not adhesions. Unfortunately, your PT may be increasing the chance of even more swelling. Do they ever measure your swelling when measuring your ROM? I insisted on it so my caretaker would understand that it was swelling not laziness or lack of motivation that prevented the flex or extension. ADLs plus your (reasonable for you) exercise regimen will get you there.
With the first knee, my blues often visited while I was on the PT table. Being a goal oriented person, I lamented not being able to achieve the goals set for me. I cried often and freely as my PT pushed and pulled my leg. With my 2nd knee, I didn't allow the aggressive exercises. I sure ticked off more than 1 therapist as I searched for the person who would work with ME the person (not the TKR coming in at 10:00am). I was an athlete when I was much younger but at this point in life, I just wanted a chance to take a lovely walk without pain. I have gotten so much more with these new knees. I needed to: practice patience; be committed to what worked for me; listen to the knee; and seek the support of Bonesmarties who had gone through it, too.