Manufactured consent

What would be an example of this? It's not obvious to me that by simply voting in a manner that benefits "the rich" then also means it's against your own interests. When someone gains something it doesn't mean I must lose something in exchange.

Something to consider is not everyone's interests are aligned. I'm not American so I can't comment on that specific area of the world, but that sort of question comes up a lot in my country and one of the biggest reasons is one party wants to make my hobbies/job harder and the other doesn't. So I don't think I'll vote for them. Now you, someone who doesn't have said job or hobbies, probably doesn't give a fuck about that. So you support said positions.

Probably unpopular answer, but it's not some clear cut "this political party has better policies for everyone". Republican policies usually are better for people living in rural areas, and Democratic policies are usually better for people in cities. I'm sure people will debate this, but this is the reason why people typically vote depending on where they live. At the very least, they believe that their party has better policies for them and their way of life.

My personal (anecdotal evidence) is that I work for a small business in a rural area, and our main customers are other small business owners (usually self employed or under 5 employees). Over the last 3 presidents, the Obama years were rough for our company, we had explosive growth during the Trump years, and then we've had stagnant growth over the past 4 years. Our largest competitor went out of business this past year, which sent us a lot of new customers, but we've also had a lot of our customers go out of business as well, so we've been pretty stagnant. Being stagnant isn't terrible, we don't have shareholders or anything, but the cost of living has increased and company profit/wages haven't which is a problem. That said I know we're doing pretty well compared to a lot of people here.

Another (once again anecdotal) example is that I have a friend who paints murals full time, for the past 30ish years. He told me that he does well with either Republicans or Democrats in office, but that his customers change. During republican presidents, his customer base is usually local businesses wanting to decorate their stores. During democratic presidents, his customer base is usually towns, state buildings, schools, etc.

But anyways, I'd be very interested to hear from some people living in cities if there's a visible uptick in income/etc when we have a democratic president, or in general what your personal observations are on how which president affects your local businesses/income/prices/etc.

False consciousness.

Bexause you have a two party system where both sides are corrupt

Kind of an indirect answer, but I've heard people state that they vote against their own personal beliefs because they think that there needs to be a balance between "good and bad". Obviously, this is complete bullshit. Even if there should be a "balance", we already have enough problems as is, we don't need the government making it worse.