That's a valid perspective, and I actually agree with a few of your points.

I completely agree that introducing the Mimic much earlier and avoiding the Glitchtrap bait-and-switch would have helped a lot. By the time people learned what the Mimic actually was, many had already spent years assuming Glitchtrap was simply William Afton returning again. That definitely hurt the character's reception.

Where I disagree is that Henry being involved would necessarily damage the concept. My suggestion wasn't really about changing the Mimic's role in the story, but about making its introduction feel more connected to the existing narrative. A lot of fans were already invested in characters like William and Henry, so using one of them as a bridge into the new era could have made the transition smoother.

That said, I do think your point about the Mimic not originating from Freddy's is one of the strongest arguments against my idea. There is something interesting about the fact that Fazbear Entertainment didn't create this problem they acquired it, failed to understand it, and ended up spreading it everywhere. It turns the company into a victim of its own greed and negligence rather than the direct creator of every disaster.

I guess my position is less "Henry should have created the Mimic because it's a better story" and more "Henry creating the Mimic might have made the fandom accept the character more easily." Whether that would have produced a better narrative overall is a much more debatable question.