Twitter made me feel: some combination of violated, indignant, numb, inferior, empty, powerless, disappointed, embarassed, furious, annoyed, and infuriated.
Comments are often terrible. You know the kind of comment where you have absolutely no idea what is being discussed or why, only that it has made someone very angry? Twitter is the land of such comments, devoid of anything other than hostility or snark (for a mile example, a gif of "double face palm, when one face palm isn't enough" kind of thing - you really have no idea that the person is responding to or what their thought are).