Complex sentence: With Magalie as the winner Season 5, turned out to be a complete fiasco; as she was not at all appreciated by the music-loving public, as she sold the least CDs by a series winner compared to previous winners Jenifer and Nolwenn.
Split into simpler sentences: With Magalie as the winner Season 5, turned out to be a complete fiasco. She was not at all appreciated by the music-loving public, as she sold the least CDs by a series winner compared to previous winners Jenifer and Nolwenn.