I’m talking about the underlying libav*. There are plenty of frontends in all sorts of languages, although ffmpeg(1) itself is obviously the most versatile. Also, CLI UX is highly subjective (hence all the different frontends by people with differing opinions), I personally find it more than acceptable for the immense complexity it encapsulates.
I'd say the fact that I can pass in multiple input sources, apply a complex chain of filters, set detailed rendering options, set output parameters, and have it all work flawlessly, and do all of the above in a single command line with consistent syntax, makes "too good" a very accurate description of the FFMpeg CLI.