Issues like the kind Mirco seems to be having (lack of attention to detail, missed quality checks, very poor communication) are the warning signs of a failing business. I've seen this type of thing time and time again, and usually the business doesn't last long once issues like this start.
When stuff like this happens it usually means that the business is either having financial difficulties, or that the owner has lost interest/motivation. In either case, it's bad news, especially for their customers.