No.
She wasn't sympathetic in Avengers Disassembled, she was crazy and killing innocent people because she was weak-minded and couldn't handle her power.
I hope the MCU won't do that over again, but as the WandaVision creator pointed out, the powerful woman who goes crazy is a tired, sexist trope.
The fact that it happens over her kids is just part of the sexism; it's the "baby crazy" trope. The show averted that by showing she would let her kids go to stop hurting people. But the people from the show aren't making this movie....