I feel like you're forgetting the part where they literally took over the world and started to rebuild it in their image. They literally became international dictators, and anyone who wanted freedom was thrown in hell. This is not a good thing. I'm sure we can find plenty of good things Doom does for Latveria, but taking over the world by force isn't "heroic"
He's also forgetting the fact that the Phoenix force flat out corrupted every single one of them very slowly.
Emma flat out killed a full family, Namor almost commited genocide (only to take out a fraction of the population in or near Wakanda, Illyana went even more nuts and even Collossus almost destroyed a school full of innocent children just to get a date with his ex girlfriend.
Hell the only good thing that Cyc did was resist the force as long as he did.
The whole Cyclops was right bullshit is almost as annoying and bad as Iron Man being viewed as some sort of saint during Civil War. Cap in both events wasn't completely right, neither was Cyclops.