You just said they did what they were legally required to do. Then cried they didn’t do everything Vance wanted. So now you contradict yourself in your own post. So in your words they did in fact cooperate.
To catch you up, the other poster said that usually the accountants would just sit down with the auditors and hammer out the details.
Know why that didn't happen? Because Trump's organization refused to let anyone sit down with the investigators. They had to go to a grand jury to compel testimony and documents.
Trump made it hard on them. That means they're not going to get leniency. Maybe if they had sat down with the investigators, amended their taxes and admitted fault, they would have gotten a fine and a civil penalty. Since they chose not to do so, they'll get criminal prosecution.
That's their choice. Now they'll deal with those consequences.