This is a classic case of data not telling the whole story.
The game had just recently clawed back to mostly positive reviews before the leaked patch notes and ensuing review bomb took it back to mixed with no other major changes at the time to actually cause such negative reaction.
The big thing your data doesn’t capture is the influx, perhaps even worthy of calling it an invasion, of Asian players to these very forums whining and wailing about the nerf proposals with some of the most asinine and unhinged comments and threads that I’ve seen since. Those of us that were here when it happened were mostly awestruck at the arguments and attitude they displayed. And since the nerfs were rescinded, they’ve been quiet ever since.