OMG, girl, I can SO relate to this. Okay, Marcel - could care less - just sits back like you're feeding him bon bons, and we cut - easy breezy, as he is about everything.
Wylie - is a NIGHTMARE ON ELMSTREET X A BILLION. Horrible. It's because when we used to take him to the groomer (a few times when he was 9mths-16mths), they cut his quick - and he has been terrorized ever since. After we realized this was happening - NO more groomer, ever.
So, we had to wrap him tight in a towel - with one paw out, me holding him with every bit of strength - and Tony would clip. I mean, practically impossible. It was like holding a 2-ton gorilla. Eventually, we graduated to me holding w/out the towel - which is what we do now. But still, he struggles, pants, and freaks out as if we're going to chop off his very arm - it's just awful. I try to tell him "NO" when he struggles and "good" when he manages to stay calm.
I so feel your pain.