I am sorry for the loss of your beloved dog.
I would phone the PDSA and get the name of whoever is in charge of the service you attended. Write them a letter explaining your concerns regarding the consultation.
My advice would be to research the Veterinary Code of Professional Conduct.
Your letter outlining your concerns will not bring your loved dog back, but if you can change the practice of a poor consultation to a consistent one that adheres to the code it could save further clients passing through the service the heartache you are suffering.
In the description of your consultation there appear to b e a number of breaches of the code
Possible breaches... Namely:
9.9 Discussions should take place regarding a range of treatment options and prognosis.
11.1 Informed consent can only be given by a client who has had the opportunity to consider a range of reasonable treatment options....
11.3 Veterinary surgeons should seek to ensure that what both they and the clients are saying is heard and understood by both sides.
11.4 Veterinary surgeons.... should encourage clients to take part in any discussion and to ask questions about their options.... Veterinary surgeons should make sure clients have sufficient time to ask questions
11.5 Vet... should use language appropriate for the client and explain any clinical or technical terminology that may not be understood to make decisions.
11.6 where the client's ability to understand is called into question, vet.. will need to consider whether any practical steps can be taken to assists clients understanding. One is additional time may be needed to ensure client has understood everything...
Were you offered a second opinion?
Were you given a quiet room with privacy to make your difficult decision?
Good luck and I am very sorry.