Short guy here. I often wonder if this issue is for short straight men? Though I don't want to generalize. I am a gay middle aged short man at 5'4, a top, and a professional in corporate America. I have never been insecure about my height. It's never been an issue, hence I have never carried a chip on my shoulder.
The ONE thing that bothers me about being short is the constant projections people place on you and the stereotypes that people tend to believe. People are quick to assume you are insecure, and they are quick to dismiss your personality traits. It seems like as a short man, you are not allowed to be moody or bitchy, assertive or confident, because people will also project onto you that you are some how insecure and over compensating for your height. How dare I be moody?
In my younger years I had moments of being an asshole and quickly losing my temper, but this had nothing to do with my height. It had to do with the fact that I experienced racism and homophobia when I was younger. I was often bullied and just got so tired of it, that I learned to defend myself and to speak up for myself. I learned to not put up with people's bullshit and I would call them out on this. But...to my annoyance, they would quickly dismiss me and assume that I was having some Napoleonic tantrum. That was never the case. It's just that I got tired of being pushed around and I had to learn how to defend myself. And I find that even in my mid 40's, you are not allowed to have these feelings because people will make a cutting comments of "he must be compensating for something!" There is a double meaning behind that statement. Not only are people implying that you must be insecure about your height, but they are also implying that you must have a small cock.
In regards to my sex life, my height hasn't really been an issue. Sure I have experienced rejections but not enough to be traumatized by them, and not enough to form an insecurity from these. As an exclusive top, I have had success being the top for both short men and tall men. I am currently partnered and he is a 6'1 bottom. Go figure! And funny enough, the tall guys that I met when I was single had smaller dicks than me. So these stereotypes don't necessarily apply.
In regards to my job? Well, I don't think I have been passed up for promotions because I am short. I was always hard working, professional and respectful of my role and colleagues. So I feel that my professionalism was what always allowed me to get ahead.
I do acknowledge that both men and women look down on me because of my height. Especially women. I am often mistaken for being straight so when I go to the store and open the door for a women to be polite, I can tell that she is ignoring me and I assume it's because of my height. The funny thing is that I don't care. I am not attracted to women anyway.
I don't care if people dismiss me because of my height. But I do get annoyed when people lean into these stereotypes, and are not willing to look beyond. But this annoyance is not enough to affect my life.
I did want to share my thoughts to offer a counter to OP's post. We live in a world where there are a myriad of people in shapes in sizes. I hope we can get past these stereotypes.