That is terrible, I also would switch vets.
Throwing a dog against the wall is abuse and I
would make a complaint.

I have always had my suspicions that Rocky had
a very bad experience at the vets when he was spayed.
He always had liked going to the vets untill than, and
their was one particular male vet tech. he hated
after that, (who is no longer their.)
It wasn't untill 3 years ago, that I told my vet that
I wanted to be in the room for simple stuff like
having blood drawn etc. He said it would be no problem,
and I have been with them ever since.