Same with me. Totally agree!

More precisely: Xcode 14.1 build 14B47b

Workaround: get an old Mac (mine is Mac mini late 2012), install macOS Catalina (10.15.7) and Xcode 12.4 (12D4e). CoreData graph editor works ok. My idea is to move the CoreData stuff to Xcode 12.4 and build it as a package and bring it back to Xcode 14.1 by importing it as a package. I did not test the package idea yet.

deleted. Not enough space for comment.

Upgrade to Xcode 15.0 beta 5 (15A5209g) and macOS Sonoma 14.0 Beta (23A5301g) regards, Johel