Huawei was not a major international player throughout this era. Competition with Huawei is not what led to the collapse of Nortel. Nortel's mismanagement and financial misrepresentations are its own fault, and trying to blame Huawei - which was barely on the international stage at that point - makes no sense.
A giant usually doesn't fall because of outside forces because like they say barbarians are always at the gate. It usually mismanagement on top of mismanagement until they can't pay their bills anymore.
