The film is about childhood trauma (specifically parental rejection/invalidation), its lasting effects (specifically feelings of unworthiness), and trying to come to terms with it. It's not a sci-fi film about the end of the world nor is it a comedy, although it is very funny. It's not a traditionally constructed, modern movie, and it's better for it, not worse for it. The acting is great, particularly Spaeny. If the pandemic was necessary for this film to have been made and to have been made in this particular way, that would be a shame, because I enjoyed this from (and this style of film) more than most of what gets made these days.
Review of How It Ends
