Windows-oriented developers bring that mess to Macs, too, and it's incredibly aggravating. For over 25 years, Apple has had Documents/Pictures/Movies/Applications/Downloads/etc folders under the user's home folder, and convention is predominantly that you never put non-hidden files or folders in the user's home directory. And you don't put application configuration in Documents, because that's what ~Library is for.

Then ignorant developers who don't care about the platform throw random configuration folders in ~/ or ~/Documents, or think their app needs a central workspace folder for all of its projects, instead of letting you manage your own damn files.