Why would God give us the ability to sin if he doesn’t want us to?

When I ask this question I usually end up getting the response of: > “Well, that was just him giving us free will!” And then I ask why he would give us free will if he knew we would sin and would send us to Hell. Which gets the response of: > “Well, he didn’t want us to be robots! That would just be awful.” Then this goes on and on. What I’m trying to ask is: why did God give us the ability to sin if he would get so mad at us that he would send us to Hell? Why did God make Satan if he knew he would tempt Adam and Eve? Honestly why even make Satan in the first place?