I think for the most part you cannot judge anothers progress unless you know them in person. So instead of trying to figure someone elses progress, I try to be supportive and maybe try to learn more about their type of mental illness so that whatever I say to them will help and not hurt. But, yes to the question if it bothers me if someone is backsliding and not progressing, but only because I care about them and I am limited in what I can do to help.
I have focused quite a bit on myself, in one area of my life, but I do best when I help others while trying to help myself.