You don't have to know who Agatha is to know something was off about Agnes. Anyone who was paying attention knew she would turn out to be someone important.
It's just speculation, I could be completely wrong, but my guess is she's not the true villain. In fact I would even bet she's another victim. I can easily see her sticking around as Wanda's friend after all this is over.
I point to Pietro as my evidence, Wanda didn't bring him back. Agatha supposedly wants to bring someone back, but she doesn't have that power, so someone else still has to answer for Quicksilver.
Whatever the story with Pietro ends up being, I think the one thing we can say for sure is that hes not the MCU Pietro brought back from the dead. Hes either XMen Quicksilver brought from that dimension or hes some kind of imposter. Either of those things may be within Agathas power.
I always thought there would be a bigger bad guy involved, but I dont know that its necessary or a good idea anymore. Theres just not much time left to effectively introduce another villain and any sort of Agatha is actually being controlled by another evil thing seems like a waste when theyve made her a compelling villain on her own. ---
For your Azuarc . At least Kupo has class and doesn't MESSAGE the people -Dr Pizza