A signal to whom ? Genuine question.
I agree, as a full-throttle textbook narcissist he would think it was be a problem because he couldn't control him.
An opportunity to gain partial influence might be a reasonable stepping stone until he can get full control (or remove him entirely).
I'm not sure it's that far fetched an approach for someone so intelligent.
It might not be the story they go with, but it's not implausible to fit his current personality in with a team up.
I’m sick of the good guys having to compromise and give in to literal war criminals.
I agree that with that kind of power, working within the bounds of corrupt/compromised systems is stupid so I'm interested to see what you think is a viable alternative.
I'm pretty sure a few of them have been done as actual comic runs.
Media does not need to portray war criminals as allies of good. They are not.
Firstly , this is a fictional space, so they can pretty much do what they want, whether or not that's something you enjoy is a different matter.
Secondly , as a premise it's really *really hard to portray absolute goodness to the satisfaction of everyone because good and evil are subjective constructs, unless you're a religious fundamentalist i suppose, then reason doesn't generally apply in any meaningful way.
A "one person's terrorist is another person's freedom fighter" or a "trolley problem" kind of subjective.
Also i'd suspect that to at least a few of the countries in this fictional setting, superman is a war criminal of the highest order, it might not be the fictional US but other fictional countries exist, with their own laws.
If you are using "War Criminal" as a benchmark you are using the definitions of the same systems of which "Boravia" is a part.
Evil is easier in general because there are common things that people will mostly agree on, but even then it's hard to get something objectively evil (outside of supernatural entities i suppose).
A fictional space is a perfect place to try though precisely because it isn't bound by as much realism.