I'd like to see people give less of a shit what other men wear.
Fashion might be the most consumerist addiction we have in the world and fast fashion is wreaking terrible damage. Any creativity is lost to brand addiction and trend chasing. Don't even get me started on advertising!
Clothes serve a utility, but fashion is the capitalisation of envy and materisalism. Wear monochrome if you want. Wear pink if you want. Just don't kill the planet in the name of "fashion".