From a wireline standpoint the downfall was when the company thought bringing in wireless leaders to 'turn it around' with their fake personalities lack of true ability to manage a business and changing a culture to only thing that matters is everyone gets along.
Wireless success was happening in the beginning despite the leaders (how could it fail - it was a no brainer situation). Now that there is competition and the success is no longer a given we can see how good they actually are.
The ability to manage a struggling business is much more valuable than riding a wave of success. We can see now how that is turning out!!