An easy way to reject that hypothesis is to consider the utter load of shovelware that Nintendo consoles attract, because top-tier studios stay away in droves.
I know it's a common complaint amongst a certain set to remember some bizarre version of the good old days when software was lean and mean and usable and did all the work our modern software does, but that time literally never existed. What you call bloat, most people either call "usability and features" or simply don't notice at all. The fact that you (apparently) don't like usability and features and prefer to call them bloat doesn't actually give any veracity to your opinions - certainly not enough to make such assertive unsupported statements.
After reading the specific example given, I do have to qualify that as an out of context quote. The surrounding paragraphs make it clear he isn't targeting any one race in particular with the genetics business, just that the master-slave relationship occurs frequently enough and in enough forms that it seems to be fundamental to our nature as a people. I have a hard time finding that objectionable.
You're heavily implying that one can find writing wherein Curtis explains that black South Africans need white rule, but all the writings I can find "easily" (via google) are about how the current government fails to be at least as good as the apartheid-era government, which is an unpalatable truth but hardly racist. Do you have some specific examples? I'm not finding it as easy to come up with damning examples as you indicated.
I will admit I've found quite a lot that can be easily twisted if you're being uncharitable but I'm assuming you're better than that.
Overall, I'm getting the feeling that Mr. Yarvin is a victim of the modern moral panic led by "right-thinking" folks, and as seems to happen far to frequently, the panic seems to be precipitated by strange misinterpretations instead of what was actually said.
Sure, he advocates for forms of government few people want. I'm not too onboard with that meaning he needs his technical work suppressed.