In a better world, the public would vote for someone and not vote against anyone.
^^^^ This ^^^^.
^^^^ This ^^^^ is incredibly naive and ignores the inherent realities and probabilities of democracy in a pluralistic, heterogeneous society.
Of course most Americans don't "want" Biden in any absolute sense, b/c most Americans would never "want" any candidate, b/c there are countless views on countless issues, such that no person could plausibly represent the ideal combination of positions held by more than a small minority of society. Simply as a function of probability, and not some unjust political system, the odds that any candidate would be your ideal is extremely small. Imagine there are 3 distinct stances on each issue and 100 issues (which is very low for both). That results is 162,000 different possible combinations of stances across the issues, making the random odds that you and any other person share the same ideal 1 in 162,0000. So, even in a perfect system w/o any bias in who in society becomes an electoral candidate, you would almost never in your lifetime encounter a candidate that perfectly represented you. Which means, that you'd never vote "for" your ideal, but always mere vote for the person who was less far from your ideal relative to the others.
Now combine with that the fact that no candidate can plausibly win unless they get support from a sizable % of the population, and that inherently requires exposure. Outside of people voting within tiny little clans/groups where every person is well known to everyone, amount of exposure always has and will depend upon resources. Thus, there is an inherent bias where those with more resources are more likely to have a chance of getting the exposure needed to garner democratic support to win. The only way around that fact is to not only eliminate variability in amount of resources, but eliminate people's basic freedom to use their resources how they want to.
In sum, to complain about the fact that we vote mostly against worse candidates rather than "for" people we ideally want is to complain about probability and the inherent nature of human society where desires and preferences widely vary across many issues.