Nate Silver gave Biden a 90% chance of winning, citing 3-4 tossup and 3-4 likely states. I don't see how his predictions don't look reasonable. Silver gave Trump a 27% last election - that's a very reachable percentage . Polls have considerable margin for error. It's standard for people to take a poll result as an absolute prediction and then rail against any error but that's not the fault of the poll itself. [2]

[1]https://projects.fivethirtyeight.com/2020-election-forecast/

[2]https://fivethirtyeight.com/features/what-pollsters-have-cha...