Your argument is directed at Windows, not PowerShell. The shell is just a shell, if a certain thing you're looking to configure doesn't have an easy cmdlet, that doesn't mean powershell is bad, just that MS didn't give you the easy button. Similar to many unix tools, some of what you need to interact with has a dedicated CLI, other things have you poking at the configuration database directly (ini or yaml or whatever for unix, registry for windows).

If you don't like the Windows style of configuration, run powershell on linux - it's awesome there too!