Can someone explain to me how this individual, clearly suffering from TDS, is allowed to impersonate a doctor?

He never finished medical school. He was in fact kicked out of it.

Twitter has verified this fake doctor who’s now giving BLATANT misinfo about #COVID19 treatments.

https://twitter.com/eugenegu/status/1289229952403902464

Excuse me, he was kicked out of his residency at VUMC, with them citing performance issues as the reason.

The actual letter got released and it more specifically said it was centred around issues with “patient care, communication, and medical knowledge”.

In 2015, his wife divorced him and successfully got a restraining order against him, based on four allegations of domestic abuse.