They’re not neglecting fans by not offering a support for a game they do not publish. Activision handles all CoD support. This info is pinned at the top of the forum for verification:
These types of grandstanding replies in the forum are not necessary, and do not work to resolve the issue at hand. If you have feedback for how Blizzard runs as a company, there is a more appropriate place to express that. Support Site Feedback - Blizzard Forums