Let's step back to when you first started your exercise program. Did you take a baseline measurement of your pain, function, and activity level? If you did, look at those measures and compare them to how you feel and what you can do now.
Many times people improve so gradually they aren't aware that the pain level is better. In some cases there's still as much pain, but they are able to do more. They may be less tired at the end of the day.
At this point it's probably a good idea to get the opinion of an expert. Check with your doctor or physical therapist for the best program to follow. Most likely, the therapist will take measurements of strength and motion. He or she will review the program you are currently following and advise you based on the results of testing.
The fact that you've stuck with an exercise program for a year is very commendable. You're right to want one that works.