Magneto didnīt wish HoM to exist, Magneto only wanted Wanda to get better and Pietro wanted to save her, HoM was just a way Pietro and Wanda thought they could do it and thatīs why Magneto attacked Pietro when he found out the truth because he thought Pietro had manipulated Wando into creating that world also lost control. He also received flak from Pietro himself and the X-men after HoM btw and if thatīs not enough he was also almost killed by the Avengers when the collective tried to posses him so I would not say he was just left scott free and all that.Now the irony is that hom is one instance in which he actually priositized Wandaīs well being over caring for mutants and this is how it ended, the man canīt win or he should just keep himself minding his own bussines next time.
This is not the first time we have talked about this and itīs why I think those arguments just go in a circular way and at the end of the day this story still is left open when it should have gotten closure years ago, so I hope what the X and Avengers office is doing or plans to do points to that direction.