2 things:
1. Agatha is sloppily written character. I tried to give her the benefit of the doubt but alot of the things she says and does has no real explanation or purpose. So when we start to dissect her dialogue, it turns out she was just saying things that didn't mean anything.
Prime example: when Wanda started to bring down te Hex, Agatha says "Now you'll see!" as if something she's previously alluded to is about to happen... but nothing happens that we hadn't already seen.
2. The Russos, Markus, and McFeely have ruined the MCU. I'm exaggerating, but how many writers and directors are going to execute Winter Soldier/Civil War/Infinity War/Endgame type meticulous writing and direction? They knocked those movies so far out of the park that the fans are now theorizing TV shows than Marvel is producing... not because of the comics but because Marvel set a bar so high even they might not be able to reach it everytime.