The thing is, it really isn't about you. Microagressions, as the name implies, are small everyday interactions that as a whole give a person the feeling that they are not part of the group.
That once was called insecurity. It happens to everyone, and if the cure is making sure no one interacts with anyone else, then we are done. Without the interactions of random people we never will find the group of people we feel comfortable with and we cut down on our learning potential. Its bad enough people believe that it is assault when they are exposed to thoughts or beliefs that make them feel uncomfortable or challenge something they believe. They need safe zones because something a speak says could be contrary to their own thoughts.
If you are not offended from time to time in college, you should ask for your money back because you didn't learn a damn thing and cannot deal with life as it happens.