That's true, you did cite Peter Rainer and I misread your post about this; sorry. :[
The US mainstream critical establishment barely took notice of the film with several publication assigning their third-string critics to review the film (most of their reviews are unfavorable). The film received enthusiastic to favorable reviews from the more reputable critics: Roger Ebert, Manohla Dargis, and Scott Foundas. Only Peter Rainer panned it.
However your post itself, your own words, mention no faults in the movie. I wonder if you saw any. I did. Basically that was my point and my focus. Tilda Swinton herself has spoken of the problem of a role that requires her to be extreme without it seeming to go too far, to be too pushed. The film and her performance skate on this edge al the time.

Probably it wasn't your intention to make your post sound skewed in your implying that what you derogatorily denote as "third-string critics" are not "reputable" but you meant "better known."