After my girlfriend broke up with me, I received such a short message today. Is she right?

That makes sense. Your girlfriend is an observant person. She has listed all your shortcomings for you. There are not many such girlfriends. People need to constantly strive for self-improvement and progress. People's shortcomings will not get better, but they need to be corrected. You should thank her for helping you overcome your shortcomings. You just need to correct them, which will make you better.