Well, Biden had a far worse inability to articulate basic points or demonstrate basic leadership qualities and they picked him in 2020, mainly because he wasn't Bernie Sanders.
You like so many others, mainly on the right but also on the left, seem obsessed with the idea this was a left/right contest, when really it wasn't. On some aspects of economic policy and certainly on foreign policy, Trump is further left than Biden. That he might actually intervene and stop the utterly pointless Ukraine war is not 'right-wing' is it? Left-wingers like Sanders and Corbyn have the exact same policy. Where Trump is 'right-wing'. if you must call it that (it's more authoritarian really), it is on social issues like abortion, trans-rights etc, but are they what matter most to ordinary working people? The election results suggest not, whether that offends us or not.
Here's some evidence ... (tip for the GB News viewers amongst us, it's OK, the Spectator is generally right-wing)
https://www.spectator.co.uk/article/...ng-than-biden/
Is Trump more left-wing than Biden? The President has a surprising capacity for progressive-sounding political analysis.
A leftist anti-Trumper I may be, but I’ve been strangely impressed by the President’s capacity for perfectly credible, progressive–sounding political analysis, especially on the trade issues that sometimes bring together on common ground right-wing nationalists and left-wing defenders of labour rights. That an estimated eight million Obama voters chose Trump in 2016, and more than 200,000 Bernie Sanders supporters voted for him in the three crucial Midwestern states of Wisconsin, Michigan and Pennsylvania, testifies to his appeal among a portion of the disaffected working class who cannot simply be written off as racist, right-wing or lunatic.