What do you think about liberals that make their lives miserable because of political correctness?

I am a Liberal and this may come as a surprise to you but I am not miserable. I think that what you are mistaking as misery is really annoyance at having someone, as you say, calling you out. A good rule of thumb is to remember that if you don't have something good to say then say nothing because it is better to be thought of as a fool then to open your mouth and to remove all doubt.