I don't know if it's even controversial, but I genuinely thought Watchmen sucked. Maybe it didn't work for me because I'm not really a comic reader in general, but everybody was like "DUUUUUUDE YOU HAVE TO READ WATCHMEN, it's Not Like Other Comics™, it's the best thing EVERRRRRRRRRRRRRRRRR" and then it totally wasn't. It was just pretentious crap.
To me, Watchmen has a limited appeal. It's appealing for people who want to read about politics in comics without it turning into a modern-day shitfest between Trump fans and SJWs, but there were more than a few inconsistencies that take you out of the story. Like, why the hell does America fear a nuclear war with the Soviets when Dr. Manhattan could probably spawn enough clones of himself to obstruct and teleport the Soviet nukes into space? Hell, the Soviet Union has most of its cities in the western part of the USSR; Doc Manhattan, according to the lore notes, could devastate large parts of the Soviet landscape, so if he did that to the western USSR, there'd be no Cold War left.
Or, if they're that adamant in ending the nuclear threat while keeping Uncle Sam's hands clean to avoid retaliation, Ozymandias could just clone his fucking tentacle hentai monster, ship one clone to Moscow, the other clone to Beijing, maybe send a third one to Petrograd, and a fourth to Pyongyang, have them explode and kill the people of those cities, and watch as the Commies eat each other in civil war and infighting once their leaders are all dead, thereby eliminating the Soviet threat and the potential nuclear war. He's going to kill millions of innocents anyways, make that strike against the Commies then have America swoop in and help them rebuild while whining about false alien attacks. Hell, if he did that, Ozymandias would probably gain Rorschach's respect, and the rest of the heroes would stay silent now that what's left of the Commie nations need America's help to get back on track and the Cold War ends.
Moore overlooking these details just weakens the details of his story. It'd make more sense if the Soviets had a godlike man of their own to counter Doctor Manhattan, so that a war between the two superpowers would probably end with the two supermen killing each other and destroying the planet in the process, making the idea of the Cold War going hot something to be avoided at all costs.