Why does it have to be zero sum?

Your power in society is zero sum. Giving it all away to an oligarch in exchange for promises of cheap consumer goods is not an credible bargain.

At what level does wealth go from "normal wealth" to "oligarch wealth"? Like, where is that line?

Also, on what planet could Bezos be described as an oligarch? Not this one. Everyone on the left and the right hates him for various reasons. The previous president hated him. This president just told his workers to unionize. Senators are constantly portraying him as Satan incarnate.

He has no political power in Washington. They hate him.

What riches, exactly? Why the hate?

I'm not sure why people hate unions exactly. Seems weird to have "freedom of assembly" but then hate those that practice it for better negotiating leverage.

This isn't about "freedom of assembly". I'm extremely pro freedom of assembly. "Unions = always good" is just as harmful as "Unions = always bad" as "Rich man evil" or "Rich man good".

Eh? I hate lots of people who I nonetheless want to have freedom of assembly. Like anti-vaxxers. I want them to be able to say antivax shit but I hate them. What exactly is weird about this?

Wanting to take away another groups freedom is not unheard of but it is anti-social.

Actually hating them probably means you have a lot of misplaced anger.