Why do people talk about me like I can't hear them?

When I am at work or in public sometime I hear people young or old talking about me in a bad way because they don't know me. They either say I am Ugly, look like a dude or why is she smiling too much. These people are adults and are acting like a teenager. I have tired wearing makeup more, ignoring people and even doing things to make myself more feminine looking. I am tired of having to please other people and tired of people talking about me as if I can't hear them.

Why do people talk about me like I can't hear them?
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