Outside of the syntax (which seems to live forever), you have things like non-sane defaults, obscurantist man pages ... the list goes on.
Repeating the same actions in a CLI with no readline is an exercise in frustration, but ... that's not what happens most of the time.
When you’re typing a lot, you really don’t want to do a lot of typing for each step. And the shell scripts were for automating some process, not solving a particular problem (you use a programming language for that). The workflow is to have the references ready in case you forgot something.
That brings up the man pages, which can varies in quality, but, for most software I’ve used, tend to be comprehensive. But they assume that you’re knowledgeable. If you’re not, take some time to read a book about system administration (users, processes, files permissions,…).
And I still think that we can improve. More over, we ought to improve.