Before you decide whether you trust the polls, you need to decide whether you trust the result.
And potential hacking aside, note that the 538 model explicitly did not factor in all the voter suppression and nullification efforts - legal and illegal - the Republicans were openly engaged in across the country, from fake ballot dropboxes to intimidating robocalls to severely limiting polling sites etc etc etc - there’s no doubt it had a significant effect (and, sadly, proved to the GOP that it was effective - look for more and more each election).
It’s all very well to talk about the odds-on favorite of the Kentucky Derby but if there’s a couple of guys in the bushes with rifles sniping at the horses it’s a little unfair to blame the bookies for getting the odds wrong.