Despite some cool horror scenes, Huesera is a boring, slow-paced drama that doesn't really go anywhere, nor does it leave any sort of message.
In the film there is the subplot of the main character and her gay relationship with her best friend, which is used as an excuse that she has a second identity, but this relationship never really comes to anything relevant, and neither does her relationship with her husband to be honest. It is simply the typical dose of mandatory forced inclusion these days.
Also many of the decisions and actions of the characters (especially some very important ones) are quite questionable, not to say stupid, and it is impossible not to cringe at the protagonist every time. Not to mention that the acting, especially of the main characters, is quite mediocre. It seems that in order not to include any caucasian characters (because there are no caucasians in Mexico, of course) they chose any actor they could find.
In itself a boring movie as a drama, and dull as a horror, Huesera fails twice as much.