Complex sentence: Arirang TV is seen as "biased and unrealistic" in its coverage of South Korea (many programs alleged propaganda similar to China's CCTV-9), and has been known to censor negative views of South Korea.
Split into simpler sentences: Arirang TV is viewed by many observers as'biased and unrealistic' in its coverage of South Korea, many of their programs allegedly showing characteristics of propaganda, similar to China's CCTV-9. It has also been known to censor negative views of South Korea.