It's a lot of people's opinions. And Scarlet Witch and Rogue were both forced OOC to give a bunch of childish and unnecessary drama. Rogue later got to be a leader, which was great. Wanda got forced out of the comic for 6 months after being killed. So no great moments for her.
And the Wonder Man stuff was creepy. It was always the worst relationship for her. Having her see him as a brother, then sleep with him was Ultimates level of bad. Their history is abusive. It should always be avoided.