A couple of questions...

Rating: 10/10 (28 May 2018)

Despite my questions, this a very worthwhile addition to the Marvel universe of movies. Just go see it.
But.....
1. The entire plot of "Age of Ultron" hovered around the witch using mind control on the Avengers. Why didn't she use mind control on ANY of the creatures she was fighting in this movie?
2. When the team was trying to get the gauntlet off of Thanos' arm, why didn't they just cut off his arm? Or kill him then?