This is very clearly true. It is also true that information bubbles like BlueSky risk doing exactly the same thing on the other side. People need to confront reality that progressives underperformed. Not just AES/Flanagan/Jackson. Bernie-picked Dunlap lost to LePage in ME-2. Disaster.
An underdiscussed (imo) aspect of this election cycle is the extent to which media consolidation and domination by conservatives resulted in huge blind spots that ultimately prevented them from recognizing the widespread anger and dissatisfaction directed at Republicans.