I am the mother who lobbed a half full jar of babyfood across my kitchen and into a wall due to the frustration you describe. I think it broke into a bunch of pieces and there was no one but me to clean it up. It doesn't get better, it just changes. My son is 13 now and I just had a baby two months ago, that's how traumatised I was, well, not really but it makes for a good excuse.
