First let me say that Elizabeth Olsen is an amazing actress. She nails sitcom roles from decades of TV eras. She does grief well, she does vengeance well, not from the series, but from the movie, she delivers two words softly but with more force than you possibly imagine. Thanos, "I don't even know who you are" Wanda, "You will...".
I would argue it is much harder to make a superhero from in imaginary country with a dead android husband into a believable character than a more mundane but regular person type of character.
Olsen and Bettamy are magic when on screen together, whether they are playing sitcom H & W, or superhero couple.
The opening episodes are a bit goofy, and the middle falls a little flat, but the amazing part is how they take what seems to be offbeat nostalgic entertainment for it's own sake and tie it into the storyline of the progressing series as well as the Avengers movies at the end.
The whole thing holds together as weird and magical (in the fantastic mesmerizing way, not the wands and brooms kind of way) story, the end makes you see the beginning in a whole new light. Definitely worth a binge or three. It is simply daring and brilliant storing telling. But it would be weird and interesting without Elizabeth Olsen, with her it is engrossing and deeply moving.
Olsen and Bettamy are magic on the screen