This is a whole lot of conspiracy bs with no sources provided.

It's not a conspiracy, it's out in the open. I don't know what claims you would want sources for. Feel free to ask.

But it includes the usual keywords "the system", "design", and "ruling class" so you can get your upvotes from like-minded fellows in your bubble.

You might notice that this is a public community on a non-socialist instance. So, the opposite of what you are saying. Personally, I expected a mix of responses.

Have you considered that politics and economics is a little bit more complicated and a lot of gears make the machine?

Complexity vs. simplicity means nothing in this topic. What matters is identifying dominant powers and the mechanisms by which they function. Many of those mechanisms are somewhat complex, though not that complex that anyone can't read about them and understand them if they actually want to.

Have you read any socialist theory?

But "the elite pulling the strings" is much easier to understand and you conveniently get an enemy.

Class conflict is actually something that emerges from base social interactions that constitute the primary economic system: how and why we work. The dominant class does have more realized power, by definition, but it is still subordinate to the mechanisms of the economic system itself.

For example, you cannot simply choose to be a nice business owner that pays everyone as much as they deserve. You will, eventually, get outcompeted by the business owners that will keep pay lower and profits higher. While small businesses are still commonly owned by petty tyrants, their loss to big box stores is an example of how a larger mass of profits can be leveraged to destroy the competition (initial low prices), then using monopoly status to earn even more profit by cutting wages and increasing prices.

The political class is just the functionaries of the state that serves the dominant class's interests. You can call them elite because they personally get a bigger piece of the pie and have power on paper, but they are several rings lower on the hierarchy.