[quote=Yog Sothoth]
Even before Disney bought them, Marvel did screw them over a bit with that house of m storyline which depowered most of the mutant population.
[/quote]

Why does everyone find this bad?

Disney bought Marvel yes, but they don't own the XMen…in fact read this:

[img=http://cdn.screenrant.com/wp-content/uploads/Marvel-Characters-Movie-Studio-Ownership.jpg]