I mean I can't fault you. Half my posts on these boards are tongue firmly in cheek.
Adams is fair, I don't recall many complaining she was older than he was so much as the color of her hair.
I also don't think WandaVision is problematic in its casting and you've hit on the main reasons, but I do think it's still fair to criticize the trend in Hollywood where that continues and likewise to call foul when someone says "so what? Big deal that it happens."