Some of his weknesses are:
1.He was having too much of temper and he use to drink alcohol.
2.His personality was too eccentric for those people around him after a while. Right before he died, he was beginning to lose the absolute loyalty of those people near him.
3.His interest in integrating/intermarrying different cultural groups with the Greeks did not sit well with many of his native countrymen, who believed that the ethnic people they encountered were insubordinate to the Greeks.
4.His enormous dreams and plans to continue conquering new territories would lead to his eventual undoing. Immediately after his death, his Companions divided up his massive empire amongst themselves.
cant find strengths