Of course not. Most people aren't that interested in politics, especially when it comes to the detail. It's all about narrative and Trump's a great story teller.
Actually, a yougov poll shortly before the election showed that Kamala Harris's policies were more popular. Problem was people thought they were Trump's policies in many cases.
https://today.yougov.com/politics/articles/50802-harris-vs-trump-on-the-issues-whose-policies-do-voters-prefer
It's...
All good points but was Corbyn really far left? Also, in 2017 his Labour got 40% of the vote, just 2% less than the Conservatives, so clearly a lot of people (~13 million) were interested in what he was offering.