The worst part is, ironically, the editor itself. As a former vim user I'd love to have vim keybindings, but the vim extensions are painfully slow and unresponsive. I ended up just using the default in spite of it being incredibly mediocre.
There are quite a few shortcuts that cannot be implemented due to missing capabilities in VS Code. For example -- this list from an author of a VS Code plugin that emulates Sublime[1].
The bigger issue, which is lost in this forest of Github issues, is that VS Code needs a good hard look at its keyboard and text processing model.
Also, your original complain was that the shortcuts are "arbitrary and don’t seem to be logically organised". This can be fixed by loaading which ever organisation-scheme you prefer. So your actual complain is, it does not match your habits out-of-the-box?
That said, for writing code, it’s fine because most of the time I’m thinking and typing in short runs of text.
I’d love for it to receive a bit of love so it’s a better at wrangling text out-of-the-box, however.