Curious if this has been your experience.
Forum whining has put me off wow before, and sometimes prevented/delayed returning to play or just not renewing, however the opposite has been far more the case.
Coming on forums and discussing wow has far more often pulled me back into the game too, but then I was drawn into discussions about night elves and things I like, rather than caught up in how terrible the new resource system is etc. Those lore and race discussions or customisation discussions, exciting new news from blizzard, have been far bigger drawers than nagging retractions.. however, forum complaining has often enough darkened my view on wow where I would not have initially minded as much