My kids taught me how to break them. Before the kids had iPads our family hadn't broken any, now... it's a weekly thing. Children are professionals at destruction.
Think positive as parent - sigh they are innovative. Destroy and then invent later. Just not in that phase.
I've damaged two magsafe connectors in the last two years. The rubbery plastic protection near the charge point (with the orange/green LED) splits. Then it's super easy to make worse since the split ends catch on things. Like https://i.imgur.com/l2uS8pv.jpg.
I'm pretty sure it's from heat damage from the power. Not mechanical strain. The heat slowly weakens the rubber material to the point of failure.