Do I need to remind you that slavery was legal for most of human history? Legality has no bearing on right and wrong, and indeed there are many places today that employ slavery-like conditions completely within the law. Criticizing business practices is a perfectly valid method for enacting change. How do you think laws come about in the first place? The idea that businesses should act however they like and your only option is to choose not to do business with them is especially stupid in situations of effective monopoly, such as the current payment processing system. Even more so given that their actions are often driven by opposing voices.
It's not as if the inhuman slabs at mastercard have a sense of morality to begin with. They just freaked out and slammed the censorship button when that group of australian karens launched a hissy fit.
Keep babbling.
You are comparing human rights abuses to that of someone saying you can't have underage characters in your sex game if you want it sold on their site.
You are comparing being used as a slave to that of a company saying you can't have use rape in a sexually charged way in your game if you want it sold on your site.
You are using the human atrocity of slavery .... CHILD slavery at that.... to a company telling someone if they want to do business on their company's platform, they cannot have games that contain content where a son fucks his mother.
Put your penis back in your pants, your desire to blow your load is at no point near the importance of the comparison you are attempting to make.
You're being ridiculous. Beyond ridiculous.
This is an apt comparison:
If you went into a consignment shop and said "Hey, I want to sell my dad's old porno mags" and they say "We sell allow sellers to offer a lot of stuff here, but not porno mags" and you get angry with them... you're the dick, not them. It's their company, not yours. As such they decide what they want to do business in. Not you. If you want to do business with them, you have to follow their rules. Straight-forward concept. Even if they said "Sure, you can sell them, but only Playboys and Penthouses - not Hustler, Cheri, Chic, High Society, etc --- only Playboys and Penthouses" --- same concepts apply.
You could still sell your dad's old porno mags, but you just couldn't do it with them. You'd need to find another way --- even if it is less convenient and less profitable and have more hoops to jump through.
In the end - you get to decide what you want to sell... that's your business (as long as it is legal). Who you sell it through, that is their business (as long as it is legal). Not yours.
Suck it up buttercup. Using slavery as a comparison trivialized slavery and shows the lack of connective synapses of mental activity in how you synthesize morality, ethics, and simply business economics.
I'm not even going to continue with this lack of a train of thought you are attempting to spit out.
Have a lovely rest of your day.