Dems always believe that people asking them to be basic Dems are THE EXTREME LEFT instead of just their voters. I don't think "people who follow politics on the internet" are representative of anything other than that, but there are a range of perspectives within that group, and "Dems are doing great!" isn't a common view at the moment.
Hey, so what, maybe they're playing the smart long game and panicky people who follow internet/cable news hour by hour are missing the forest. Maybe!