Macbeth had too much pride and tried to control his fate by killing the king.
Macbeth's fatal flaw was having too much ambition which drove Macbeth to do immoral things. His wife acted as a major contribution to his downfall, pressuring him to kill the king.
Macbeth's ambition and thrive to be powerful caused him to lose his friend who he had the murderers kill.
When Macbeth discovered the 3 witches prophecies, it ignited the flame of his ambition and pride that went to the extreme in the end.
Macbeth's ambition led to excessive pride which resulted in his unavoidable fate-death.
Macbeth never expected for his wife to die, but she committed suicide. As an audience, we realize the consequences of being too prideful. We can also feel pity because losing someone who is closest to you is a hard thing to go through.