Commodore did not even do half of what could have been possible with the Amiga. They had no idea what they had or how to market it. It was mismanaged right into the grave.
It wasn't certain from the start that Commodore would go down that path. If I remember my little bit of Amiga history correctly, the management which pushed for Amiga, Inc. to be acquired did not see the acquisition through, and subsequently left the company. Hence, the guys who had something of a vision where the Amiga fit into Commodore's future were not the ones who actually got to make something/anything out of it.
After the departure of the founder, Commodore was left without tech-savy management, which time and again hurt them until the end. I suppose not really knowing what to do with Amiga is but part of the picture. Did Commodore make good use of MOS Technology/CSG?