In Sam and Allison's conversation after she snuck out in the second episode, he says that she doesn't want someone to talk to, but "someone to listen and nod and agree with you." After ten years with Kevin and his friends who enable him, it makes sense that's what she thinks conversations should consist of, that's been her experience for the past decade!
Neil is referred to as a Pyromaniac in the first season, but at no point is ever shown to start any fires. Instead, Kevin is always shown as the one to start them, simply because he enjoys it. Considering that Kevin refuses to accept responsibility for anything, it's not at all a stretch to believe he is the real pyro, and either framed, gas lit, or convinced Neil into taking the fall for him numerous times before.
In the Grand Finale, Kevin ultimately does himself in, dying in a fire he drunkenly started. In other words... Kevin fucked himself.
Likewise, while a case can be made that the show only running two seasons was a result of being Screwed by the Network, it makes sense from a narrative perspective. After all, Kevin's sitcom world was one of the driving forces of this show, and in the back half of the finale, not only is it outright destroyed by Allison announcing her intention to divorce him, but he dies in a fire. Can't keep doing Kevin's sitcom if the lead actor is dead.
And in another meta sense, like its inspiration Kevin Can Wait, KCFH lasted for two seasons, but unlike it, it ultimately brought things full circle by killing off the doofus husband while the wife moves on with her own life, better off without him.
Just as a final cherry on top: the girlfriend Kevin is dating in the finale, who promptly leaves him after talking to Allison, is played by Erinn Hayes, the wife that was killed off on Kevin Can Wait. Kevin outright tried to replicate that show's trick, and it failed before the episode was even done.
It makes sense that Allison’s attempt to break free from the sitcom have ripple effects that cause everyone else to slowly break free from Kevin's sphere of influence. Neil reevaluates his life and realizes he wants more than to be the dumb sidekick, and Pete's new girlfriend gives him reason to live for himself. Even better is that it's when he's without his "supporters" around that Kevin can't maintain the sitcom anymore. In a way, Allison beat Kevin at his own game.
It’s extremely fitting that Kevin died as soon as he got out of his sitcom framing by his own hand. Similar to how there was no profanity in the sitcom setup, there was also no death (Even Nick was put into a coma and didn’t die until the final episode), and once he was taken into the show’s larger framing, that plot armor was gone, and with the kind of stuff he does, he was going to eventually do something fatal.
Why did it take until Allison asking for a divorce for Kevin to get out of the sitcom framing as opposed to anyone else cutting ties? Sitcoms typically require an ensemble cast, which is referenced in Kevin becoming disturbed when he’s the only person in the room. As long as he had someone else to engage with, the sitcom framing would stay up, but as soon as he becomes alone for good, his life can no longer be a sitcom.
When planning Kevin's murder via bungled robbery with Nick, Allison says she will go stay with her mother out of town to get out of the house while it happens, and mentions that she often visits her around that time every year. It makes you wonder why Allison doesn't just divorce Kevin and stay with her mom, since having no place to go was one of the factors trapping her in her marriage. Season two's "Ghost" answers this: Allison's mother Donna appears in a flashback and is revealed to have her own sitcom filter just like Kevin, and spends her brief scene verbally tearing down Allison's self-esteem. Allison would just be trading one abusive situation for another.
Fridge Horror
When Allison meets up with the guy Marcus sent her to so she could get drugs, this friend thinks she's a prostitute and tries to come onto her. When she pushes him away, he says that Marcus told her that she was into that kinda thing and tried to continue before Allison set the record straight, but if he'd continued thinking it was part of that, it could have ended with Marcus setting Allison up to get raped as payback for hitting him in the face in the previous episode, despite her apology and cookies. This is confirmed to be the case in the third episode, where he slimily mocks her and knowingly acts like she really is a sex worker.
Neil crying that "everyone leaves" when it seems Kevin and Allison are moving away and constantly referring to her as 'Mom' becomes a lot less funny with Patty revealing in Episode 4 that their father was a truck driver who was barely home and that their mother died when they were both children, with Neil finding the body.
In "Broken", it's shown that Kevin's sitcom world perspective extends to Neil's world, even when Kevin is far away and Neil is with other people. This isn't because Neil is the same level of malignant narcissist that Kevin is. Rather, it's indicative that Neil is so wrapped up in Kevin's world that he's incapable of leaving it the way that Allison and Patty are, because he sees himself as a character in Kevin's sitcom. He's even more trapped psychologically than Allison or Patty to a certain extent.
In the Season 1 finale, Neil was revealed to have Kevin's influence rubbed off on him and went all Yandere mode on Allison by strangling her for trying to erase the recording before Patty hit him in the head. This leaves us wondering whether he may have assaulted Patty before at some point in time.
The one glimpse we have of Kevin in the real world is terrifying. He's not just an insensitive idiot who accidentally harms others, but a knowing abuser who physically and financially threatens his wife for defying him. It makes you wonder what those sitcom scenes really looked like ...
Kevin's dad Pete is eventually going to find out that his son died shortly after he left for Florida. While Pete was rightfully fed up with Kevin's manipulative and cruel behavior, at the end of the day, that's still his son who died. He might even feel guilty about his son's death (not giving Kevin the address, ignoring his calls), especially if the fire possibly gets ruled as a suicide rather than an accident (if that's possible).
