Complex sentence: People with the disorder often come across as arrogant, callous, and envious, tend to be exploitative in their interpersonal relationships, and can be excessively preoccupied with personal adequacy, power, prestige and vanity.
Split into simpler sentences: People with the disorder often come across as a combination of arrogant, callous, and envious. They also tend to be exploitative in their interpersonal relationships and can be excessively preoccupied with personal adequacy, power, prestige and vanity.