I've been avoiding this thread so far because I was late in watching the show, but I just finished it last night. Overall, I liked it, but a couple of things bugged me.
How did Agatha end up in Westview? It's implied she was a citizen of the town when Wanda went there. Coincidence, stalking Wanda, or did she just magically insert herself there somehow? Did she arrive in Westview before or after Wanda's mental break?
Hayward's character was very disappointing. Oh, the leader of the powerful organization who originally acts like he's helping is actually an antagonist? Yawn. Done to death in the MCU. Not to mention, his role as antagonist only serves to take time and drama away from conflict with Agatha.
Also, I think this was mentioned earlier in the thread, but I don't think Hayward should have been arrested at the end. He's the leader of SWORD. Everything he did seems within the power of that organization, and the US government clearly let SWORD take over the operation. He may not have been moral, but I don't think he did anything prosecutable.
On the other hand, Darcy Lewis should obviously be arrested for assaulting Hayward. He was retreating/fleeing when she came from nowhere and rammed him with a truck. That was clearly attempted murder for revenge, zero chance for a self defense claim.
And, dang, those were some long credits for a TV show.