Sorry to hear about this @Somethingintheheavens and about your poor dog, and I hope she is on the mend now.
I haveno suggestions o how to let go of the anger to be honest, but it will fade eventually... it's still only been 3 days.
However, shit like this is the reason why DH and I will never have any more pets. We have had pets (cats, rabbits, and hamsters) since the late 1990s, and our last cat died last year, aged 18 (the second from last died 2 years earlier, aged 17.) We noticed over the past 5 or 6 years or so that the vet bills were going up and up and up, and when our last 2 cats got to 16-ish, they suddenly started to go downhill health-wise.
With both cats, the vet said they wanted to do multiple tests and scans and x-rays and all sorts, and they may need to go onto meds for the rest of their life, and have certain treatments and all sorts. Long story short, it was going to cost 100s of pounds a month, and 1000s over any given year. That had never happened with any pet - ever, in the 25-ish years DH and I had had them, OR when our parents had pets when we were younger.
Pre late 2010s, when pets became very old, and they started to become ill, the vet would put them to sleep, yet now, they seem to want to milk every last penny out of the owner. Doesn't matter if they can't afford it, or if it's not in the best interests of the animal. It's all about the ££££ $$$ ££££!
My friend's 19 year old cat was diagnosed with a mass on her stomach in October, and the vet wanted to operate on her. The operation was going to cost £7000. She wasn't insured as she couldn't get insurance as the cat was so old. She said she wanted to have her put to sleep, as it makes no sense to put a very old cat through that, and the vet even said there was a chance the surgery may kill her. (I bet if it did, they'd still want their £7000!)
They tried to talk her into the surgery for her cat, but she stood strong and refused.
Yes I know NAVALT (not all vets are like that!) but many are now, and it's really sad, because it's putting people off having more pets, and soooo many animals now will not be able to find a home, because so many people are being put off by the bloody vet bills! That is the main reason DH and I won't have any more. I would love another cat, but can't risk the ever-rising vet costs bleeding us dry. The price the vets charge for the meds alone are hilariously high. It's farcical!
And as has been said, not everyone has the luxury or good fortune of having multiple vets to choose from, and it's really, really difficult to find one that doesn't charge the earth! Many of the bills are more than humans pay for private health care!
Oh and pet insurance isn't worth the paper it's written on most of the time. There's soooo many things it doesn't cover, or it will only cover so much for so long, and once the cat or dog gets to about 8 or 9 years old, the premiums go up hugely! So much so that many people can't afford the pet insurance!