They are just shit lazy. I have 3 kids plus pets, when my kids were younger I worked part time and my husband worked 12 hour shifts, I was training for marathons, my husband for ultras, plus running kids around to swimming, dancing, football, tennis, table tennis, netball and judo. Me, my husband and all my kids did volunteer work too, plus me and my husband along with 2 other people set up a local running club where I was a run leader and my husband a coach. Our house was never dirty and seldom untidy, they are just plain lazy and are happy to live in a shit hole. They are teaching their kids it's okay to be lazy and dirty.