I've looked at a few dissections of some polls that show things really lopsided in weight (ie, 25% republican, 38% dem, etc), which I don't think quite represents the reality in the makeup of the final vote proportion. In fact, wasn't this one of the problems in 2016 as well, the underweight of republican voters? Have they learned nothing in 4 years?
You'd think the pollsters would want to maintain a modicum of credibility, but this is truly ridiculous. It goes beyond just incompetence at this point, it's a simultaneous effort between the pollsters, the left, the media, the tech giants, etc. Are all trying to will Biden's victory into reality. It's the Green Lantern theory of winning elections -- if only we will it enough, it will come true.