Hard disagree. While they had lost a ton of ground people were still sporting blackberries in large numbers. The absolute bone headed move they did is they continued to promote and sell their legacy models front and centre cannibalizing their own future growth.

There were other issues that were much smaller in the bigger picture like android app support on BB10 coming a little late as well as the devices in general had a somewhat underpowered SoC. All of these contributed to slow adoption, but the fact they were promoting new models of the Bold while their warehouses were full of the Z10 was really what did them in.