Before the event, about 200 people turned out to protest Rittenhouse’s appearance, far outnumbering the amount of people who attended in support of him.
This is something of a microcosm of the country. We outnumber them, by a lot.
If you look at the popular vote, Biden won decisively. But because of how the electoral college works, it's all about winning states as opposed to winning a grand total of votes, and small states tend to swing right.
Even though Biden won the popular vote by several million votes, the election was actually decided by roughly 200,000 votes spread though a handful of swing states.
A mix of voter apathy and gerrymandering gives an outsized right wing showing on voting day. If more people voted then the actual outcomes would be a lot more representative of the national demographics. Which is why il"Get out and vote" is seen as unfair by the right.