That is terrible! Poor Oliver!
Unfortunately, I had bad experiences w groomers - Cricket got an ear fungus from one, shaved by another that cost me an arm, etc. I just started grooming myself years ago.
I scissor cut for years. I just recently (this weekend) tried the modified "Joey/Zoie" cut that YTer's were nice enough to share the how-to's for the rest of us - turned out pretty good!
I would watch the cut for infection. Ladyjane has a great idea to find a groomer that is comfortable w you staying and watching. I would find a new groomer if I were you.
I'm sure as cute as Oliver is, he can carry off any haircut! They can't stifle his cuteness!