Atom's vim support is OK, but nowhere near the best. Kate (KDE), IntelliJ, and emacs EVIL all offer better support (others may, but I haven't used them). I completely agree that Atom is way ahead of VS code in vim support.

I use Atom a lot, but I wish it had support for the goto column command (pipe), proper search/replace support (it does weird things with the trailing slash, deleting words at the end of lines, and macros.