Complex sentence: The charity, which performed a variety of charitable works in Haiti between 2005 and 2010, effectively closed in 2012 after much controversy over mismanagement of funds, with many believing that a large portion of the profits were not used for charitable purposes.
Split into simpler sentences: The charity, which performed a variety of charitable works in Haiti between 2005 and 2010, effectively closed in 2012. It had generated controversy over mismanagement of funds, with many believing that a large portion of the profits were not used for charitable purposes.