Elaugaufein
Member
In a nutshell: The Watchmen characters are not fucking symbols. They do not represent anything beyond themselves and their role in the story in which they originally appeared, and any attempt to ignore or change that is never going to be able to escape the gravity of the original work.
Also: yes, Doctor Manhattan is certainly a morally compromised character at the end of Watchmen. Every character is, including the one who refused to compromise and paid for it with his life.
That doesn't mean that reducing Manhattan, or the story as a whole, to "despair, apathy, and disbelief" is anything but an extremely shallow, surface-level reading of Watchmen. In fact, its ending still manages to be considerably more hopeful than many of the dark and violent superhero comics that Johns himself has written, including this week's Justice League #50.
I disagree with you about symbols. Because their meaning is almost always ascribed rather than inherent it's easy for things to become symbols of what they caused or became associated with (like the Swastika). Even if that was never the intent. That doesn't always replace the original meaning though, symbols can have multiple meanings after all.
I wouldn't say Justice League 50 is bleak. It features a new Green Lantern being created because of the bravery of their sacrifice and a chance for redemption for Darkseid.