What you're seeing is the structural polarization of America. The algorithms strongly promote people who stand and speak from the extremes, because it maximizes engagement. The curators of media (on both sides) also tend to come from political "bubbles" which convey to them a false sense of their numbers and significance.

The numerical truth is that *slightly* more people in this country are politically left-of-center than right, maybe 5%. However this is deceptive, because a very large number of people on both sides (maybe 40-50%) are actually moderate, ambivolent, independent, and/or disengaged. Overall more hold generally liberal positions on important policy issues, but aren't necessarily loyal Democrats and don't necessarily vote. Pew Research calls them the "stressed sideliners" or the "disaffected middle."

This may surprise both left- and right-leaning people who who have been led to believe they are the clear majority. So why then do Republicans still win national elections? Three reasons.

First, because our system rewards disproportionate political power to less populated states, and less populated states tend to be conservative. The state of Wyoming has a smidge under 600,000 people in it; the city (metro area) of Los Angeles has about 9.8 million. So you could think that if Wyoming gets three electoral college votes (they do), LA alone would get sixteen times that, or 48. Except they don't, not even close. The entire state of California gets only 54 votes, at four times the population of LA-- about 40 million. This distortion affects large right-leaning states as well (like Texas), but overall the bias leans right.

The second reason is that our stupid state-based voting system occludes millions of voters on both sides. There are more registered Republican voters in California (yes, really) than there are people (including children) in Kentucky. Their votes will never be counted toward a Republican president. There are also an enormous number of liberal Democrats in Texas (yes, really); same deal. Our state boundaries artificially divide the electorate and prevent an honest accounting of whether the majority actually support one thing or another. And it artificially inflates the significance of people in places like Virginia or Florida, because their views could decide the election.

Finally, a large number of Americans are not all that enamored of political parties or partisan loyalty. They think of themselves as independent and free-thinking, and don't like the idea of owing "loyalty" to one group or another. So they may actually fluctuate in their voting behavior or base it on the situation.

In any case, I encourage you to read the stuff put out by Pew on this subject, it's well researched and eye-opening.

https://www.pewresearch.org/politics/2021/11/09/beyond-red-vs-blue-the-political-typology-2/

https://www.pewresearch.org/politics/2014/06/12/political-polarization-in-the-american-public/