I groomed one of my most difficult dogs today. He hates to be touch. He hates the dryer. I have been grooming him since he was a youngster. He has always hated grooming. He is a happy, normal dog otherwise. I tried desensitizing ( or as much as can be done in a few hours once a month). I have tried training. I have tried discipline. I have tried going super slow. I have tried sweet talking. I have tried being firm. I have done him straight through. I have broken it up into short sessions with lots of breaks. Nothing has ever worked with him. 
So what do you do when nothing works? You do the best you can. I let him air dry as much as time allows, cutting down the time he has to handle the dryer. I towel his head very well and it’s usually dry enough by the time he goes home. I work around where and how he wants to stand. I do whatever I can to relieve his stress and just as important, my stress.
His feet are not beautifully round, but the pads are shaved out so he doesn’t get painful matting in them.
His nails are not filed, but they do get cut, even though he hates it.
Sure, I could muzzle and hog tie him and get it done my way, but no one wins doing it like that.
Instead, I take a deep breath, put him on the table, and just let him be him. Whatever his reasons for hating the grooming, he believes in them enough that I’ve never been able to change him mind. So I make the best of it and do what I can to make it the least stressful for both of us.