Gendered clothes for children, especially pink glittery princess bullshit for little girls.
Equally annoying is the wall of blue and, at a pinch, beige for boys - although they do at at least have the advantage that clothes deemed to be 'for boys' tend to be better sized, designed more with comfort in mind, and constructed more sturdily to allow for actual play.
My youngest is in need of a pair of new shoes and we were looking online at some rather splendid sequinned trainers but he's decided against them, because 'if I wear them then even more people will assume I'm a girl and they will believe me even less when I tell them that I'm just a boy with long hair'.
Personally I don't really 'do' pink or frilly or heels, have a more-or-less uniform of jeans-anna-Tshapedshirt, and tend towards the pragmatic in my clothes purchasing. Hand wash/dry clean only are things that happen in other people's lives. I don't think I own a wooly jumper, because it's never cold enough to warrant one. I have a fleece or two, but no coat because coats are really bloody expensive and I can't bring myself to spend that much on something that won't fit properly anyway, since I've never found a proper functional coat designed for a short lardarse.
Other people make different choices, and like different things. The world keeps turning.
