When reviews became numerical and used to recommend content via algorithms, was it any wonder they became as broken as any other form of rating online? Incentives and emergence shape everything. Want a good critic? Find someone (an individual) with tastes similar to yours. The aggregate is always a distorted mess of corrupt business practices, incompetent hot takes, and people you disagree with mucking up the waters. That there is or was ever "critical consensus" should be the least reassuring thing.