Seriously you are deluded, while it is conceivable that Trump could win at best it would be a narrow win. No way in the world will it be a land slide.
Biden winning with a landslide is conceivable
The polls got it wrong in 2016 but only by a slim margin that gave Hillary the majority of the popular vote but gave Trump a win in the EC
Polling companies have gone to great lengths to not repeat 2016, for them to get it wrong this time they would have too be so far off the margin of error it's not funny