The company we contacted's primary job is vectorization. They are a specialized industry, and as a specialized industry, you would expect that a finished product from them would reflect that status. If you spend all of your time doing one thing, you get better at it (or should). Their fee is a flat rate, and isn't quoted on an hourly basis.
I fully understand that, but you had expectations which, given your supplied artwork, were, I suggest, unreasonable.
So let me get this straight. When someone offers an opinion which is different than yours, your automatic knee-jerk reaction is that they are "trolling"? That is the reaction one expects from a crybaby punk who feels that the world owe's them something. I'm not saying that you
do have the juvenile sense of entitlement that is all too common these days from many young people, but you might. The evidence so far suggests this.
I don't see that as audacity; I see it as common sense. If you hired a company to do something for you, and then they don't complete it as they promised - would you try to hold them accountable?
The fact is they did a reasonable job with your highly complex, crap file. Again, I suggest that it is
your expectations that were unreasonable. I don't know the company you used, or their standards of output, but you must have at least a tiny amount of "reason" rattling around your brain to understand that they can't offer an image of what every file will look like. They likely do good work with reasonable files.