Or try zsh with a good pre-made config like grmlzshrc[1]. It allows changing to a directory by typing only its name (or path). This includes the .. directory. Doesn't get faster.
I believe that you also don't need the space when you specify a path:
cd\foo\x
The cmd parser in Windows is the most bizarre piece of software in common use. I don't believe there is a single person that actually understands how it works completely.
[1] https://grml.org/zsh/