I'm kinda new to owning hermit crabs and studied for them and their tank but my bigger crab wrecked it twice
He dogged around the water pools and made a mountain of substrate neext to it and ended up getting it ALL IN their food. He knocked over a climbing thing and I think he is bored because my other crab is molting
It’s just part of their normal behaviour as wild animals. Larger crabs are not physically stronger which means greater ability to lift and move things around.