Complex sentence: Eventually he was given command of the Gross-Rosen concentration camp, although he was not suited to role and one of his evenutal successors Johannes Hassebroek commented that he was a "cruel, corrupt and drunken man".
Split into simpler sentences: Eventually he was given command of the Gross-Rosen concentration camp, although he was not suited to the role. One of his successors Johannes Hassebroek commented that he was a "cruel, corrupt and drunken man".