Sounds like you have spoiled your pet and haven't let them know who is boss in your household. Most breeds of dogs do not like their nails cut. You should be firm with them, but since this has obviously been going on for sometime it's best to let your vet or groomer cut their nails. Like children, dogs will often act up with their owner, yet be quite placid when a vet or groomer deals with them.
Never sedate your dog unless your vet gives approval. Nail clipping is not a good reason to sedate your pet!
Sorry, but I was told by my VET that I needed to tranquilize my dog to cut her nails and get her groomed, and my dog is a pet and knows exactly who is boss. She is very nervous and her original owners abused her, so when it comes time to cut her nails she MUST be tranquilized. BTW, the VET refused to cut her nails because she was too nervous and told me to give her tranquilizers to get her groomed. And she is not spoiled, just saying.