You were very strong not to give that Vet what she deserved right then and there...I would have cut her off at the knees.
I recommend that you write a letter to the owner of the practice and describe in detail the events as they unfolded. If your puppy is really as bad as that Vet indicated, then by treating you so poorly and running you off as a potential client, she just cost her boss a huge amount of $$$ that you would have had to spend keeping your bulldog as healthy as possible. Do NOT tell the owner that you are never going to return and you may get a reply...an apologetic reply. How you proceed from there will be determined by the content of the reply. Either way, if that Vet worked for me she'd have been taken down a few notches. There's simply now cause for arrogant behavior like that. By writing that letter you'd be doing future Bulldog owners that visit that clinic a huge favor.
Additionally, you might mention that the Vet never offered any diagnosis of your puppy that would bolster her position that she would live only 5 years.
Did that Vet say your bully had entropion, cherry eye, pulmonic valve stenosis, enlarged soft palate, demodectic mange, hip or elbow dysplasia, luxating patella, etc?
We all know that bulldogs are more likely to have some medical issues come up as they age, but we address those issues when the time comes and we keep on loving our babies. Those like that Vet(and thankfully, they a few) will never get to experience that love and companionship...they're missing out.