Earlier quoted context omitted.
Elon was always problematic. His increasing social media use removed the natural filters that prevented people from seeing it.
I'm not defending Musk, but "problematic" used in this type of context is one of those words that says more about the speaker than it does the subject.
Musk is easy to laugh at and to criticize. Problematic encompasses his lying, pettiness, racism, sexual weirdness, ego and fraud as well as anything. Regardless of the proportions of specific traits, as a whole, he’s a problematic individual. That’s perfectly cromulent.