Downsizing: Never good, but I suppose mildly interesting oddity for the first 30 minutes or so. Then just truly terrible. The story was crap and it never seemed to be able to decide if it was parody or earnest.
Christopher Waltz was kinda funny, and I enjoyed the unintentional irony of him saying that all these people claim to be shrinking themselves because they care about the planet, but really they just can't hack it in the real world (an observation that is true of many environmentalists, but likely lost on everyone involved in making this movie).
Again though, main takeaway is that this movie really sucked.