>>527664927
I think people misunderstood most of the lore honestly, me included.
It's not so much that Edwin made everything, he's more or less just a contractor for Fazbear Entertainment. The only thing I really find egregious is him perfecting the Springlocks, that just makes Henry and Edwin look worse by default.
Henry selling him out is something I'd bet more on him being spineless and a pushover in the 80s based on the books, William more than likely got him to agree that Edwin was a lost cause and the best case scenario was taking everythign from him. I think he only really grew a spine in the time between 1 and PS.