Loving the arcade, but unfortunately, the difficulty of the final boss is "ultimate custom night" difficulty; not "final boss" difficulty. There are too many characters active that have the "search all 18 rooms for 2 or 3 of these things that spawn in random locations" ability (and I think the chicken things that swap the cameras can move).
On top of that, there are also characters that have conflicting powers, like the chickens obfuscating key rooms like Mad Hatter Poppi's or your side doors, critical if you need to clear Sammy (if her glitch effect decides to trigger at a reasonable interval) or not waste time keeping Nile locked out. And Nile holds you in position so long, she basically gives other characters free rein to finish you off.
With things so heated and no breathing room, it makes paying attention to the story 4th or 5th priority. But I do appreciate the game actually has you make use of the cameras and not just guard the doors.
I can feel the love and hard work in every room, character, voice, animation, and joke.
Edit: I feel a bit bad after mentioning how great the game is about keeping you involved with the cameras after learning about the generator power cheese strat. Every problem I mentioned before and much more were completely invalidated. The only threat was Security Office Poppi and I was able to beat the boss on my 2nd attempt. At least now I can mess around in the custom night.