You need to do things that are appropriate for a small company when you’re a small company. And then if you become a large company you change things to suit you

You need to do things that are appropriate for a small company when you’re a small company. And then if you become a large company you change things to suit your new scale. All of the troubles you described sound like bad management. I’m sorry if you’ve had to go through that. DBAs that are setting up a replacement are going to need time to do that right and expectations need to be set that this is a tricky problem.