I'm a determinist, so I don't really believe in evil. More on the point, I don't think Dada is suggesting we need some absolute leftist leader to implement financial security for all. Merely that we should strive to accomplish such in the most ethical manner. If you are talking about any and all leftist leaders in general, I think you might be too paranoid to function.
This is unfortunately a common trope when capitalists discuss socialism. Namely, they see the concepts of socialism and totalitarianism as inseparably linked (possibly unintentionally, because most of them probably don't understand a thing about this) because when they think of socialism, they think of the Soviet Union under Stalin. Of course, once you start doing some basic research, you immediately throw away that concept because it's nonsensical.
Being evil an asshole or psychopath certainly isn't exclusive to capitalists. Again, I really don't think anyone here thinks that, nor thinks that all capitalists are evil. (except perhaps Barrack/DietCoke)All your points are either paranoid, crazy, dumb, or misanthropic.
It's not about people in the first place, but about the system. Capitalism is a guaranteed route to sharp inequality. By extension, it's also responsible for a lot of other evils, such as colonialism and imperialism. Racism is strongly exacerbated through class warfare and politics.
Anyone who consciously and, fully knowing these things, would argue that it's not just an ugly truth, but an ideal to uphold, is pretty close to any definition of evil I can come up with. Just like someone who would claim that Naziism is an ideal to uphold. Most people really just don't know a thing about any of this and certainly don't consciously agree with it, of course. Personally I prefer to think that not people, but their actions, are evil, and that people's values can be simply described by whether or not they support things like freedom of choice, equality, inherent rights, et cetera. Some people are undoubtedly evil, but if that's where the analysis ends, it's not good enough.
But ultimately, the people are dispensable. If an apologist for elite policy decisions, like US foreign interventionism, dies in a car accident, you can get another guy to take his place no problem. There will always be stooges willing to sell out humanity. Those will never be in short supply, so I don't worry about that too much. It's about the system.