Obviously, some don't like her anti-establishment ways. From Politico:
Democratic leaders are upset that she railed against their new set of House rules on Twitter the first week of the new Congress. Rank and file are peeved that there’s a grassroots movement to try to win her a top committee post they feel she doesn’t deserve.
Even some progressives who admire AOC, as she’s nicknamed, told POLITICO that they worry she’s not using her notoriety effectively.
“She needs to decide: Does she want to be an effective legislator or just continue being a Twitter star?” said one House Democrat who’s in lockstep with Ocasio Cortez’s ideology. “There’s a difference between being an activist and a lawmaker in Congress.”
It’s an open question whether Ocasio-Cortez can be checked. She’s barely been in Congress a week and is better known than almost any other House member other than Nancy Pelosi and John Lewis. A media throng follows her every move, and she can command a national audience practically at will.
None of that came playing by the usual rules: Indeed, Ocasio-Cortez’s willingness to take on her party establishment with unconventional guerrilla tactics is what got her here. It’s earned her icon status on the progressive left, it’s where the 29-year-old freshman derives her power — and, by every indication, it’s how she thinks she can pull the Democratic Party in her direction.
The Democratic Party insider culture is weird, creepy, and super out of touch. It's basically the annoying people in College Democrats from the 1980s and 1990s who look down on others for not obsessing over Roberts Rules of Order. https://t.co/kTQhAdqVOE— Matt Stoller (@matthewstoller) January 11, 2019