I posted a lot of in thread earlier, but I think I abandoned around page 20. It never ceases to grow
Namor not only has been a super villain who flooded cities many times, and destroyed Wakanda in AvX, he also destroyed whole inhabited earths many times with both the Illuminati (Reed, Beast, Tony) and the Cabal (Thanos, Terrax and friends) during Time runs Out
The terrigen mist plotline was as bad for mutantkind, as the incursions were for all earth life. They werent actually a universal thread. Universes could be saved by destroying the earth of that Universe. The Shi Ar tried to do that. Nobody thought of moving all earth life to another planet. Both the Illuminati and the Cabal destroyed the Earths of other universes to save ours until Doom "saved" the day.
I am sure most of the animosity towards Emma is based more on the adultery-homebreaker-dresses like a slut-is a bitch angle and not her actual crimes. Her biggest crime ever is very recent, destroying the zeppelins of Ahura in IvX. Before that you would have to go back to the Firestar mini to see Emma at her most evil, and what she did there pales in comparison to what Marvel has made heroes do since the 2000s.