I already do hate Kennedy about as much as every other American president. The problem is that you're mistaking a dispassionate recognition of the significance of his assassination for hagiography or "worship", because you're letting your contrarianism and hatred of JFK blind you. It's similar to how Ben Shapiro decries leftists for being motivated by feelings rather than facts, when it's actually the other way around: Ben is motivated by his contrarianism and hatred of leftists and marginalized groups, which blinds him to the rational arguments for scientific socialism (please understand, I don't think you're anywhere near as bad as Ben Shapiro, comrade, it's just an analogy).

You may be right about the Cuba stuff. I may have perhaps given Kennedy too much credit by projecting a moral stance for his decisions during the Bay of Pigs invasion, so I'll do a self-crit there. However, I do know that for whatever reason, the invasion resulted in JFK and the CIA hating each other. I also know for a fact that Kennedy was going to withdraw from Vietnam---which by itself is enough to make his assassination a huge deal (regardless of whatever motivation he had for doing so).

I completely agree that our lives would be just as shitty today had JFK not been killed. But I also believe that his assassination was a pivotal moment in the Cold War---and this is actually a completely materialist position, not great man theorizing. How can that be? I'll explain with another analogy.

The First World War happened entirely due to material, not personal, reasons: capitalist imperialism. Nevertheless, the assassination of Archduke Franz Ferdinand was a pivotal moment in world history, because it marked a significant turning point. It was when the material forces of capitalism finally came to a head and burst into bloody imperial conquest. It's not that we're worshiping Franz Ferdidand as some great man who was holding together peace in Europe.

In a similar fashion, the escalations of the Cold War and the Vietnam War were entirely inevitable due to the material necessities of the military industrial complex. JFK was high on his own supply, as you suggested. He was stupid enough to believe that he could say some pretty things about freedom and liberty and successfully lead the world to peace despite the material need for war, and it cost him his life. No, the world would not be a better place today if he hadn't been shot dead, because the Deep State would have eventually gotten its wishes by another means in due time---just like World War I would have eventually happened if Ferdinand had survived that day. JFK was not holding the peace of the world in his hands, he was just some asshole who got merc'd because he stood in the path of the rampaging elephant of imperialism, and highlighting that fact is useful and illustrative to liberals that we don't live in a democracy, but rather a dictatorship of the bourgeoisie, because capitalism doesn't care about who you vote for.