Rant: Why is kids' clothing so fragile?

My 4yo's favorite shirt got a hole in the armpit after like 3 washes. THREE. It was a $28 shirt. I've seen my jeans last 5+ years and my kids' stuff falls apart in weeks. Is this just how it is or am I washing things wrong? Also why do all these "durable" brands still look destroyed after one season of actual kid wear? I'm not expecting iron man suits but come on.