Ability to add colors to sections, especially sidebar for "Home" for example. so hard to find the categories of Direct Messages, Spaces etc when its small text in light grey on white background.

Impossible to get clarify and find stuff. just feels messy overall on the site tbh. if you have this much stuff and functions, stuff needs to be color coded and maybe like bold titles etc. it feels like reading an essay or an article where there is no paragraphs, no titles, all just one big text...