I can't tell if this series is trying to be serious, or just over the top. There's an amalgamation of random crap going on at a breakneck pace, with random encounters, introduction of new characters, and plot happening at breakneck pace. In the end, there's a lot of unrealistic scenarios and happenings that happen, and I don't think you should take this series as a serious dive into a person like Satou's psyche.
In the end, the story has a cast of misfit characters, each with their defects, all of them struggling to pull themselves together. These cast of characters use each other, have each other as companions in their conquest towards something that they don't even know themselves. Satou is socially and mentally unstable at all times, and to a certain degree, it's a tale about a guy who can't do anything right and his encounters with people with problems. Misaki needs someone to act as a "project," Yamazaki is afraid of change, taking that step forward and uses all sorts of escapism in order to combat it. Hitomi is unsatisfied with her married life.
For Satou to save them is impossible; after all, he can't even pull himself together. It's a story about people wanting change, struggling to do something, and also standing in despair when you can't make that change.
But it's also a story with wacky humor, random aims at doing something stupid, like a "political revolution "of sorts, and an overall bizarreness to everyone's goals.
I can't say I really liked this series a lot. There's perhaps an element of truthfulness to the people in the story, but it's more a of a elaborate fabrication of "misfit individuals" that doesn't delve too deep into someone's psychological happenings. It tries to be deep, edgy, and in the end, giving hope, but all I see is a failed story about the ramblings and stupid events circling around Satou. Rather than empathizing with Satou or any of the other characters, I think "oh, that just happened." It's because there's a disconnect in terms of how the characters act, and their actual personalities to make for a wacky comedy that doesn't take itself too seriously. I never really thought I knew the thought process behind honestly, anyone. There's a lack of focus in the characters' emotions, and all you get is nonsensical plot and dialogue, self deprecation, or motivation towards the new weird thing that Satou or his friends are doing.