I use Eclipse and build UI front-ends with WindowBuilder in the environment. I got interested in IntelliJ (why? - just curious) and downloaded it. There was no clue onboard about building a UI in it. After hours of only finding YouTube videos on coding your own UI from scratch while using IntelliJ, I came to realize it is TOTALLY USELESS; the IntelliJ IDE is incapable of using a UI builder like WindowBuilder.

Result: Removed the IntelliJ application from my several computers and apologized to Oracle and Eclipse.