the ratings for it at imdb.com have it at 5.5. How much of this is the kind of review bombing that tends to involve so much of these kinds of film and how much is about legitimate criticism I don't know.
I do know that prior to the Golden Globes the major winning for the majority of Critics organization was Anora, a film that has since involved his own controversy because of star Mikey Madison's announcement that she didn't use an intimacy coordinator during the sex scenes.
I suspect that Emilia perez's mass acceptance leading up to the Golden Globes had less to do with the quality of its film than Hollywood's decision to embrace the story of Gascon and transgenders across the world, which has become the cause celebre of the left for the last several years. Emilia Perez was both international and the lead was a transgender actress, so I suspect it was Hollywood's way of giving their middle finger after the 2024 election results. (Which I think is at least partially on them but that's another article.) They were for Gascon and the movie as a symbol, and then they learned that she didn't share their values so they have turned on her. I suspect after the Oscars Saldana and Gomez will deny they made this film or that they even known Gascon. (Not much of an exaggeration; they weren't exactly willing to support her when this came out.)
I suspect that much of the itnerest on Emilia Perez had less to do with a film then what it represented to Hollywood. i don't think Green Book and Crash were as BAD as everyone said they were but neither would have been my first choice for best film that year. (Capote in 2005 and Blackkk Klansman in 2018 in case you wondered.) There were clearly better films this past year - Wicked, The Brutalist, cONCLAVE, The Substance - but Emilia Perez represented Hollywood's chance to feel important rather than quality with the Oscars which sadly they do far more often then not.