Did he? He’s one of the most powerful people in the country.
You’re actually missing the point of the troll though, which is that you don’t need some impossibly pure-hearted angel to make political progress, and it’s actually not wise to tear down your most promising leaders because they aren’t lemming who will embrace political oblivion just to please random football players on twitter (!). AOC’s fine, let her do her job.
The better point though is that she’s probably not doing anything wrong and saying something nice about Nancy (because she may well like Nancy and not everything about Nancy is actually terrible) is not a reason to tear her down at all. She never was the “my hatred is pure” type of person and she isn’t now, but that doesn’t mean she’s sold out at all.