Here's an article about how massive of a success the original NES and Gameboy were and how it revived Nintendo as a company:
https://www.polygon.com/2019/4/19/18295061/game-boy-history-...
I have no idea where you got the idea that any of those products were mismanaged or cost those companies enormous amounts of cash and in fact those specific examples are among the most successful product launches in video game history.
>The Xbox 360 sold 85 million units, one of the best selling consoles of all time.
The XBox 360 is the best selling console from Microsoft and ranks 9th among all consoles behind the Playstation, Playstation 2, Playstation 3, Playstation 4, Switch, Gameboy, and Wii.
Read into that what you will.