Nothing but fantastic reviews for Antkind so far. This one's from Alexander Moran at Booklist, and you probably shouldn't click it if you're avoiding spoilers:

[...] this novel is magnificently imaginative, bringing to mind Beckett, Pynchon, and A. R. Moxon’s more recent The Revisionaries (2019). With this surprisingly breezy read, given its length, Kaufman proves to be a masterful novelist, delivering a tragic, farcical, and fascinating exploration of how memory defines our lives. (Source)

I haven't come across a single negative or mixed review yet.