Seriously, as a kicad dev this is a neverending nightmare of subjective complaining. There was even an old-timer going on a rampage recently on the kicad forums about how PADS was the most superior EDA tool in the world, why aren't we a clone of PADS??
Basically the CAD world is exactly like people arguing over vim vs emacs
I mean it is possible to define "bad", but it would be something like "the common actions take too many keypresses". And that's about it, which isn't really a problem KiCad has anyway.
Even default keybindings are very personal. Some prefer to focus most of the common ones in one place (say around the qwer/asdf/zxcv cluster) so you don't need to move hand much, while others would rather go by easier to remember names and have [M]ove and [D]rag. I guess you can still define the "bad" here by neither intuitive nor convenient, which is to say "LTSpice", but most programs are not that.
Basically the CAD world is exactly like people arguing over vim vs emacs