Your attempt at damage control fails because the Argent Crusade, who are objectively good guys, also thought that the Forsaken were acting like the Scourge.
Face it, back when they were led by Sylvanas, no one liked the Forsaken. The Alliance hated them, the rest of the Horde also hated them and kept them as allies only for strategic value, and pretty much everyone sane and good on Azeroth was either wary of them or wanted them gone.
It's such a miserable and despicable existence that Sylvanas herself, their leader, committed suicide as soon as she had her revenge, and came back only because she didn't want to stay in Hell. That's what the Forsaken are. They are such a cursed race, that their leader's first thought after her quest was done was literally to kill herself and be free of that miserable existence.
But under Calia, the Forsaken will finally enter an age where the Alliance and Horde will no longer be (rightfully) terrified of them, and that is an improvement.
People in-universe aren't nearly as terrified, hateful, and resentful of Alleria and the Ren'dorei as they were of the Forsaken. The only guy who complains about the Void elves, literally, is Lor'themar Theron, and he's a random nerd.