I spent about ten years in the Avaya ecosystem and when we joined it the first thing we noticed is that Avaya promoted bottom feeding. The large national resellers were awarded for going after the existing Avaya base of the smaller partners. Avaya also promoted the gray marketing of its product and refused to crack down on larger resellers who were gray marketing product. Avaya was cutting off its own legs. Avaya was a terrible ecosystem to work within and it was destined to fail.
OP @3ihy+1lvl4zhr, I agree, everything led to an epic failure.