X-Box would beg to differ since 2002.
https://www.shacknews.com/article/121384/last-one-at-the-tab...
Don Mattrick almost tanked that entire product and it survives today because Phil Spencer miraculously managed to turn it around after all of the previous leadership was forced out of the company.
Guess what, so was the first NES, and the first Play Station, the first Game Boy, etc. for their respective companies.
Breaking into a new market, with a new product, in uncharted waters, with no prior experience, with no support from clueless executives who don't believe in the new product looking for any reason to stop you from burning cash, endless turf wars such large and expensive projects create, makes it is hard, brutally hard, for any company to succed on the first try.
>and went through a very rocky path
The Xbox 360 sold 85 million units, one of the best selling consoles of all time.
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.
Define the best? It is 10th in a list of consoles that sold at least one million units. It sold less than console release later and went through even rockier path - PlayStation 3.