Commodore messed up more, because they had something that could have been great.
Atari messed up badly early on, but never recovered.
Commodore never kept pushing the Amiga design. A 1985 design was still being sold in 1992. Management was too involved with their pet projects, and decent stuff was dropped through petty politics. AAA could have been great.
And messing around in the PC market was stupid.
But they never sold enough. They needed to sell 10m+ Amigas by 1990 for it to have a really viable future. The next generation chipsets needed to not be interfered with.
The ST did quite well despite being a quick design. Again, it was never going to go anywhere - the TT variants were never enough at the high end. There was nothing special about the hardware either.
