Griffith didn't keep up his skills
By the time this film rolled around the career of the great D.W. Griffith was well in decline. While his camera work was robust, his ability to work with actors had not kept pace. Both in movement and dialog, as well as conveying emotion, the acting was very wooden. Actors lined up in rows, speaking as though reading from cue cards.
The art of acting had advanced tremendously in the 10 years since Griffith's hey day. Understanding that sound was still a new innovation and actors had to stay close to the microphone, there were already directors who had figured out how to get movement and good sound (Hitchcock for one).
His camera work was still top notch and actually quite stunning when there was no dialog, and his editing skills were still sharp. However, the moment the actors had to interact with one another the camera went dead, and so did the actors.
I suppose the only saving grace of the film was Walter Huston's ability to create a character, but even he did not give a good performance due to the directing.