Trump won even by popular vote this last time. You sure you want to make the claim that it's voting in particular that gets people who can "do better" in positions of power? How can a person be so dense as to think that voting is what keeps those who do harm out of powerful positions when every president, certainly at least within living memory, has wrought unmitigated harm upon the world?

Gotten rid of the feudal system where you only have power of you’re genetically born into it?

LOL. You honestly think voting is what ended feudalism?! And you think people in power now weren't born into it?! Behold, the intellectual heights of liberal "thought."

If voting didn’t matter, why would people fight and die for it?

Right, 'cause no one ever fought and died for something that wasn't true or didn't work the way they thought. (facepalm).
Also, if voting did work as you say, why do people still have to fight and die for their basic livelihoods and the well-being of their children, let alone the myriad other reasons people to this day are fighting and dying? There are just so many ways in which these questions reveal a deep and fundamental misunderstanding about how material reality works, I don't know where to start. Oh and wait, didn't you just say that voting ended feudalism? I guess all that fighting and dying was the sideshow, just done for emphasis apparently.

If voting didn’t matter, why do conservatives want you to not vote?

Why do you, a liberal, not want conservatives to vote? Or maybe you do, in which case you should be content with Trump who was voted in. But to answer your question about conservatives: it's rather obviously because they're the part of the machine that generally has less popular support for the time being. This isn't rocket science. Funny how despite that fact, conservatives still have as much and usually more power than the liberal "progressives," I thought this voting thing (that ended feudalism! lol) was supposed to magically solve all of that.

If voting didn’t matter, why bother pretending and gave elections?

Because people like you believe the lie that it gives them some sort of power and control over the systems that rule them. Obviously. In other words, it clearly does work miracles to placate doofuses.

Why should you give up your agency over your government?

You shouldn't, and that's the point. Only a fool thinks voting within this system is exercising their agency.

In response to all of your "iF vOtInG dIiNt WoRk tHeN WHY" questions, how about this: If voting did work to give ordinary people power, why would your bourgeois overlords (who literally control more absolute wealth and exercise greater relative power and control than any rulers at any point in human history) let you do it? Answer: they wouldn't.

Or are you cool with the people who didn’t vote and kinda let Trump take over?

Ooooh, so it's all about people who realized they were only given shit options to vote for, they're the real problem here, not the people who.. umm.. voted for Trump? According to you voting has all this amazing magical power to effect the world. But the people who actually used that supposed power for their choice of Trump aren't actually what ~~put Trump in the presidency~~ let him "take over." No, you think the problem is the people who can correctly identify a rigged system. Trump won the election via people doing exactly what you say they should do, by voting, but when it's not the outcome you wanted, you say the man who literally won the popular vote "took over" and proceed to blame that "takeover" on the people who chose not to use that supposedly great power to endorse genocidaires. My god liberals are such a fucking joke it still gobsmacks me somehow.