Jack Tramiel didn't doom himself when he took ATARI.
Under his leadership, ATARI made computer history with the ATARI ST line.
It is when he semi-retired and let his sons at the helm that the company slowly degraded into irrelevance.
Selling the exact same model of computer for 7 years was what doomed ATARI.
His late return consisted of killing the computers division and betting everything on a new game console (the Jaguar).
But his strategy towards games was simply to make the best possible hardware, and game would follow automatically.
Something that worked before for computers, but would not for consoles.
The Jaguar showed it isn't enough to have the best hardware, you need the best games too.
(In the same vein, but different company, the SEGA DreamCast showed it isn't enough to have the best hardware and the best games, you need to have the best marketing too.)