C'mon, you should know by now what defines a console as a failure. In consumer terms it's the inability to give out SW that would make people buy the console.
The other time when you call a console a failure is when it after it stops selling it will turn out that you haven't earned a single penny out of the HW and SW sales.
You have X amount of money, you invest Y into a new console and earn Z amount of from selling your product. In the end you find that X-Y+Z
Deep into the darkness pearing
Long i stood there
Wondering
Fearing
Doubting.