That is objectively false. Madame X scored 5/6 points better than Hard Candy and MDNA on Metacritic and reached 70, which is a perfectly respectable score. It didn't do that much better on Meta than Rebel Heart, but that makes sense since Rebel Heart was considered a course correction. But the scores don't tell the whole story: the vast majority of the reviews said that the record was artistically daring and that Madonna seemed more artistically engaged than she has in a long time. They just varied on how well it worked. Not to mention that some of the negative reviews were ageist. Again, what did the Madame X era do to tarnish her legacy? And what do you suggest she should have done instead?