Too stupid to refuel?

Hi, I really have to ask you something, even if it sounds strange. I’ve been driving 3L for some time now and now I seem to have become too stupid to refuel after more than 20tsd km. I now have 2 times at 2 different gas stations that this automatic stopper at the pump has failed. Normal fuelled: tap taken and put into the tank, lever pulled, fixed with the small hook (or whatever that is) let go and run ….. Normally the diesel inflow stops automatically when the tank is full. It happened to me two times that the stopper failed and the diesel is sprayed in all directions from the tank. How do these stoppers work???? Am I too stupid after more than 6 years of refueling from today to tomorrow, do I only pech or can I lie on my car/tank??? I hardly dare to fill up my car anymore because I don’t feel like such a mess Does anyone have an idea?? confused greetings