My nuanced take is that voting has some effect at the local level but not equivalent impact at the Federal level as that's where the playground of lobbyists and the donor class. That's why no matter who is president there is a war somewhere, the dollar keeps losing value, the debt goes up, spending increases and unemployment keeps rising steadily. We had a vegetable for president for a good four years and the machine kept chugging on, which already tells you that he was irrelevant to the larger picture. Unless we are voting out the Fed or for a constitutional convention, it's a pointless exercise in the long run.

For sure, local and even state elections are the most critical. I'd still argue the federal elections are very important, but not just presidential, but for the House and Senate too. However, local and state elections are the most important, especially if you're in a small town or rural environment. I'd say some of your concerns are systemic, not specifically a problem the electoral system. We need to elect people who have the stones to do things like you mentioned such as ending the Fed, calling for Constitutional Convention for several amendments and repeals (critically, the Seventeenth, and preferably the Nineteenth also) and so forth. As for Biden, it's pretty clear he really was nothing but a puppet, he had all sorts of handlers and figures behind him. T'was an excercise in trying to defeat America but they needed a puppet to make it look like it was honoring of our electoral system. One thing that always makes me hopeful is the knowledge that evil always overcompensates. Always. Tolkien actually observes this in the concept of "Morgoth's Ring": Sauron poured the majority of his essence into the ring, as a refined and concentrated form of his power. This made him extremely powerful, but was a centralized point of failure that led to his defeat. Morgoth, Sauron's master (and an analog of Lucifer), did the opposite: he poured out his essence across the entirety of the world, corrupting everything he could, but this left him weak and eventually led to his defeat as well. Same is true for the evil of our time: either it centralizes its power and tyranny and eventually topples under its own weight OR it tries to encompass everything and leaves itself vulnerable and weak if people open their eyes to see it.