Saying a piece of software "should be expunged from the Internet" is a bit overly dramatic. I got real value out of the software. Most of the issues you mention

Saying a piece of software "should be expunged from the Internet" is a bit overly dramatic. I got real value out of the software. Most of the issues you mentioned sound fixable (e.g. color schemes of PCB layers, keyboard shortcuts to rotate a part), but I am sympathetic to flaws that can't be fixed no mater what because they are intrinsic to its low-level design. For me, the biggest issue with Fritzing is not its apparent (and I believe, fixable) flaws, it's that the project these days looks practically abandoned. I'm interested in contributing serious resources to the project to fix the fixable, but still trying to get a good handle on its intrinsically unfixable design flaws. Lack of a good parts editor is not an intrinsic design flaw (one can be created and integrated into the project), but perhaps "wires between pins" is an unfixable flaw? Likewise, I wonder if KiCad's UI/UX issues can be fixed... (fwiw: I helped fix HealthCare.gov, so I'm not one to shy away from a challenge!)