I agreed with most of it, but I think ultimately if the squad and Bernie are not willing to go around the country and tell people face to face that Biden and his ideology are responsible for all this suffering then the Republicans who will do that will control the backlash. The half in half out approach is killing us.
I think it wouldn't be what Tulsi was doing as much as establishing the left as a distinct force and creating a counter narrative in the wide swaths of the country the left currently has no presence outside of election season.
In the absence of that Biden will shit the bed for 4 years and the republicans will simply say the left is the more extreme version of Biden. Nobody will care that some twitter accounts with hammers and sickles really hate Biden or something, if the left wants to be seen as opposition it has to be the people the left actually put in office.