To my
limited understanding -
It's not terrible, it was just never implemented for the modern OS users.
Since Windows Vista (2007), Windows Firewall with Advanced Security interface relies on the Microsoft Management Console component from Windows 2000 (according to Wikipedia), so it never really had a consumer-friendly UI for anyone.
The Windows Firewall status page in Control Panel is basic information, then again most of Windows Security in Windows 10 is install-and-forget.
Average Windows users are simple-beings and won't use any complicated software *cough* EMET.
Source: Scraped together from Bing searches.
In my opinion, GlassWire Free is just a fancy-UI network monitoring tool. Also available for Android, looks nice, but Skins cost money.
I've seen some using
Update - Simplewall - A tool to configure Windows Filtering Platform