They were in physical pain and began screaming in terror whenever they were released, and couldn't see their children. They were also unable to move or speak if Wanda wasn't physically near enough to them for them to be part of her "story". Monica literally describes it as excruciating, terrifying, and violating. Wanda mind-raped 3000 people.
Zemo now has much more ammunition to use against Superheroes.
It's not like that exile is going to stick and it's mostly so she can master her powers (which were part of the problem).
Like, I get wanting to support Wanda, but there's only so much the protagonist-centered morality can get away with.
And just like in HoM, she gets away with it. I'm not surprised at all.