Complex sentence: Founding his publishing company in 1946, Hart-Davis was praised for the quality of the firm's publications and production; but he refused to cater to public tastes, and the firm eventually lost money.
Split into simpler sentences: Founding his publishing company in 1946, Hart-Davis was praised for the quality of the firm's publications and production. But Hart-Davis refused to cater to public tastes, and the firm eventually lost money.