Earlier quoted context omitted.
Also, Atari didn't get marketing (Jack Tramiel was very reluctant to spend money there). Atari really didn't get systems software, either, and never hired to the extent needed to make a good impact there. The world was basically safe from Atari being anything other than a low-end consumer computer company. And the thing that probably saved Apple in the late 80s was the desktop publishing business.
Also, Atari didn't get marketing (Jack Tramiel was very reluctant to spend money there). I know that is the conventional story (and pretty similar for the Amiga). I'm not convinced. I think that both the Amiga & the Atari ST were too far ahead of their time. They were multimedia workstations, without anywhere to play that multimedia (except on other Ataris and Amigas). Like you said, the Mac managed to hit the deskto…
I never used things like MiNT, but those weren't supported by Atari anyway.
Atari just didn't have the resources to sink into an OS that could compete. They knew how to make cheap hardware, but after a while the PC ate their lunch. Nobody wanted to do biz with the Tramiels, so games were pretty much off the table.