I don't buy that but happy to be proven wrong. I was following AOC's race closely before she won her election (any before anyone had heard of her). They went out of their way to work with and endorse her competitor. It was AOC's hustle and innovative techniques that made up for her huge money disadvantage (~300k at the end of the election vs ~3mil) as well as the fact that her rival was appointed the seat through a loophole (and so never really learned how to run a campaign) that resulted in her win.
The opposition spent 10+ million trying to unseat her since then.