Accurate polling today unlike just 20 years ago, is a near impossible task. The first problem is how do you get a truly random sample. A large segment of the population do not have a landline and do not answer calls from numbers they don’t recognize. This adds a bias to the sample that is hard to correct for. Web based polls are even worse. Then how do you correct for voter enthusiasm and motivation? Finally, you have the Trump Effect voters. These are working class voters who have never voted for anyone except for Trump, because neither party has represented their interests. Trump not only speaks to their concerns he has followed through on his promises and consequently they will come out to vote for him. This group may be 500,000 to 1,000,000 strong.
Having written that, Biden has TV ads running in NYC, which is a bit shocking and the reason is, is that internal GOP polling in NY state has Biden with a 5 point lead, which is almost unbelievable.
If you don't trust polls, just pay attention to where ads are being run. That will tell you more than any poll.