For context I am 17m (straight) 5'3" in the U.S, yes there is genuinely people who won't date you for your height or any number of reasons, or look down on you because of your height. But, I think there is just as many people who don't care about that at all or is the deciding factor. And the self imposed attitude that all women only care about height, or that because your short your life is doomed I hate. It is my personal opinion that people use being short as an excuse to not work on themeselves, or just giving up. Instead of accepting it, moving on, and focusing on what you can change.
I am not going to deny people see me as definetely less authoratative and traditional masculine (doesnt help that I have a little bit of a baby face), but work ethic, results, and outgoingness has genuinely made it so I've never really encountered an oppurtunity where height has been a limiting factor. I know i'm still just getting into a career but in highschool I had a large roles in many major clubs, and had a few internships/jobs, and got into a really good university.
And with relationships the idea that because you are short means you are doomed I find equally disappointing. This past school year (senior year of high school) I haven't really focused on building a relationship with anyone because I would be leaving for university, multiple different girls had crushes on me this year and throughout high school I have had other relationships/situationships. Most of them were taller than me...
Two things I have noticed is that meeting people in person and building friendships first helps before moving to something more serious, and you can usually tell if they are intrested. And from my experience bi-girls are more willing to date short guys... I will say my face has a more adrogenous so maybe that has something to do with it idk.
Anyways this is a rant and I know everyone has different experiences but I really think short guys overvalue height when there is so many other things that matter. Like yeah we're short, okay everyone knows that so find people who value you for you, and if they immidiently dismiss you because of height you probably didnt want to be close to them anyways.