Bad management? most likely
Piracy? I doubt it. However, there is one thing that no one has mentioned: proprietary hardware. Look, if you could have a machine that did everything the Amiga did and used open market components, then I think the Amiga would be hot right now! That was the hope of the AmigaOne. You can't have cheap hardware unless there is a lot of competition, which means anyone and their brother can make it. That's why pc's are dirt cheap today. What do you think would happen if everyone on this site could build a computer to run Amiga OS without having to pay AI for the privilage to make it and using off the shelf parts? M$ makes their money selling an OS and they don't care whose computer you put it one. It's the manufacturer's job to make the OS work on their computer. I thought this is what AI was going to do. I was fooled again. :-?
