We have Monica's account to how much it hurts, and Darcy at least alludes to it. Yes Agatha is lying about part of it, but we aren't just relying on Norm.
Plus, even if we discount the pain, there's still the slavery.
I'm saying, we can't just spin this to let Wanda totally off the hook, even if lies and manipulations of others contributed.
Plus I just rewatched the "All You Do is lie" scene where Wanda slams Monica to the ground, and it's clear only Monica's own powers spare her injury (because Wanda is surprised she's okay). There's clear indication in that Wanda is having something of an empathy problem, mixed with her temper tantrum. She was ready and willing to turn Monica into a road pizza.