I want to start this off by saying I appreciate that you seem to be open to correction and that you respect the community and its rules. 99.9% of the time when someone, especially from another instance, suddenly appears here to defend Democrats or the false dichotomy binary system of US politics, they are trolls commenting in bad faith and don't deserve anything less than comment removal. If you genuinely do not fall into that category, then there are plenty of people here who are more than happy to discuss any of this with you, noob-ness not being a factor at all.
That said, I think you do have some brainworms regarding electoralism that you would do well to excise. Anyone who grew up in western (especially US) "culture" is going to have some brainworms, as it's unavoidable when you're saturated by propaganda from birth as USians are. I just want to be clear that saying you have brainworms is not an insult to your character. What does speak to the health of a person's character is whether or not they're willing to recognize, examine, and rectify those brainworms.
The only thing i dislike is the implication to that "there are no good choices" and we should just give up
A few things to unpack here. First of all, no one is saying there are no good choices and definitely no one is saying "we should just give up." You are the one who seems to have that sort of defeatist attitude (though it looks like you're struggling to come to terms with that) when you say things like "Most of humanity probably deserves to die off," which is an ecofascist-aligning position. And even "every year gets worse. Every country gets worse," is a very defeatist (and incorrect) thing to say, as it totally disregards the gigantic strides that socialist countries have made towards the betterment of humankind.
More specifically on the Democrats and "no good choices" thing, we would say that Democrats are not a good choice and literally no better of a choice than a Republican because both of those parties serve the interests of the ruling class, they are both parts of the same machine whose purpose is to suppress the working class while protecting and serving capital. They have different roles to play in that machine (see the ratchet effect) so they are not identical, but expecting either of them to actually help you or be beneficial to you is folly. Unfortunately, due to those electoralist brainworms, a lot of people who otherwise would be allies in the struggle for a better world are misled into thinking that voting for Democrats is a means to improvement when they are not. They aren't even a "lesser evil" that will help stymie the descent into fascism. They are not a lesser evil, the are part of the exact same evil machine, and they won't stop fascism because their role is literally to impede leftward political movement as a bulwark for the right. Democrats aid fascism, they do not stand in its way.
Voting within a bourgeois system, especially at the federal level, is generally useless, yes. We can get into that if you want (such as how the tremendous political energy spent on promoting bourgois electoral candidates saps all the energy that could have been spent on actually useful organizing, as well as making people think they've "done their civic duty" by voting, excusing and dismissing them from doing what actually needs to be done for progress to happen), but even for those who are still unwilling to accept that fact, it doesn't mean "there are no choices" because we still have for example PSL candidates, who aren't running with an expectation to win, but to expose more people to socialist thought. In short, there are good choices, but voting for Democrats is not one of them. And when you defend or support Democrats, not only are you not helping, you are aiding the fascist side. When we criticize Democrats specifically it is usually because so many people have been fooled into thinking Democrats are on the left, that Democrats represent resistance to fascism.
Finally, what you said about how we are "blaming everyone else" is ridiculous. We are very clearly "blaming" the ruling class. But it's not even about "blame" which is a very idealist (and incorrect) framing. We correctly identify capitalism as a system (and imperialism on a global scale) as being the source of these problems and that is what we are struggling against, including Democrats who are just another facet of the ruling class enforcing its will over the rest of humanity.