Most ARTFs are built down to a price to sell, they are not built up to a durable quality. One of the cost cuts is that the wire used in undercarriages is not the correctly tempered piano wire that we normally use but some other metal which is either too soft and collapses and bends, or is brittle and snaps easily, whereas piano wire is springy and takes enormous abuse without complaint. On many ARTFs you can actually see hairline cracks in the metal at the bends, and delamination of the shiny coating when you take it out of the box long before it has even sat on the ground. It was probably this, and not your flying or rough ground that snapped the noseleg.