[sirwhinesalot]

Then why are the APIs they provide such turds?

Cocoa is excellent but who knows when Apple will deprecate it for SwiftUI (which is not very good yet, if it ever will be)?

Windows is a disaster of half-finished APIs. Win32 doesn't even support dark mode. Windows Forms was on life support for ages and only now is getting some love, but it doesn't have a native look despite being built on Win32. WPF is stuck on DirectX 9 and was also on life support for a long time. UWP is dead, effectively. WinUI3 requires bundling 38MB worth of DLLs (many DLLs), is a pain to install and setup a project with and somehow performs worse than electron apps (don't look at the callstack when you click a button, it is scarier than RE9).

And Linux... well there's Qt which really wants you to drop QtWidgets and use QtQuick instead that nobody likes, and GTK is actively developer hostile with a severe disdain for backwards compatibility.