Tulsi Gabbard—what do Democrats have against her?

Tulsi Gabbard is just as far left as the rest of the Democrat party candidates running for 2020, but she's younger, prettier, more talented, more articulate, a veteran, a minority and a female. She should be the dream candidate, a photogenic trifecta, but they are attacking her. Why?

Let me float this one. She's a threat to the one they are grooming--AOC--and they know they can pull her strings. Gabbard they aren't sure about.