The entire spoiler or dividing vote hoax is based on this false assumption that the voters carry the responsibility for not voting for a “lesser evil” candidate when that burden of responsibility should instead be on the nominee for not doing enough in their power to win over votes

No, that’s just plain incorrect. The spoiler vote phenomenon is an inevitable consequence of our first-past-the-post election system. Whatever you start from, this voting system trends to two parties over time. You can model this and watch it play out. It’s not a hoax. We even saw Ross Perot make a serious run at the presidency in the 90s, and he ended up with zero electoral votes, and 4 years later he did much worse and his Reform party fizzled out and nothing came of it. Because it is absolutely suboptimal in our voting system.