Lately my wife has been breaking our children's stuff and now I'm arguing with her about it.
You often get an argument with her about this?
I always get into this argument with her
You shouldn't argue with your wife over that. Just ask her what's bothering her and why does she take it on your children toys.
She just keeps breaking shit and I'm tired of it.
I understand you want to get to the bottom of why she's doing this, but arguing with her isn't gonna get you anywhere. You need to figure out what is causing her to have these outbursts. Maybe therapy would be good for her.