Sound, dialog and scripts for sound film were all primitive compared to films made only a few years later. The great silent actors were all gone, most having thick accents. Very few did like Charles Chaplin and made the jump to sound.
Likewise, none of the great sound film actors had yet emerged, and scriptwriters were still figuring out how to write for sound. The acting is universally bad, so are the scripts. Virtually all of them are rated two, or even 1 1/2 stars (by whoever it is that decides that stuff) None of the names I see in movies from 1930 appear again in anything after 1931.
These movies belong in a class by themselves.