Complex sentence: The film was a hit and Oliver starred in two further Winters films but in 1935 left the film studio, RKO Radio, and the series floundered with Helen Broderick and later ZaSu Pitts in the role for another three films.
Split into simpler sentences: The film was a hit and Oliver starred in two more Withers films, but she left RKO in 1935. The series foundered, with Helen Broderick and later ZaSu Pitts in the role for another three films.