I don’t think this is true across Blizzard. Overwatch is the best it’s ever been.

The Steam userbase would appear to disagree, with the recent reviews being mostly negative reviews (and the user reviews for Overwatch have hovered between mixed and negative for years now). And this doesn't appear to be from review bombing by some specific subset of players, the language breakdown shows reviews ranging from mixed to negative in all major language groups (English, Russian, Chinese, etc.).