It just really annoys me when people don’t take me seriously because of my size and age

First of all my size like how tall I am people think kid like what? Haven’t you seen a short adult?! Especially if I’m with cowboy he’s like a whole foot and a half taller than me and then my age… like I get I’m young and most mid twenties don’t know certain things but I do my research I’ve spent countless hours doing my own research I know what tf I’m talking about 😡