I know exactly what you are talking about. Keep track of those small victories, they do eventually add up.
I am 5.5 months post surgery with SLAP team (2 anchors), rotator cuff repair (2 sutures), and decompression. I have about 90% ROM and still do PT 2-times a week. It has been very slow for me regaining ROM after all the work and even slower regaining strength. My little victories:
I can raise my hand to about 170-degrees with my arm completely straight. Today I actually caught myself waving to a friend across a room with my operative arm
I can pull a 1/2 gallon of milk out of the fridge or lift a 1/2 gallon pitcher from across the table (you know, like to pour yourself a glass of wine!)
I can write near the top of my white board in my office and can erase too!