If Macbeth has a flaw, it's that he is too easily bullied by his wife. We would never see that flaw if it weren't for Lady Macbeth bullying him.
Lady Macbeth poses the greatest threat to Macbeth in the play as she is the one who instigates his ambition and pushes him to commit regicide. The Witches also pose a significant threat as their prophecies fuel Macbeth's ambitions and ultimately lead to his downfall. Lady Macbeth's manipulation and the supernatural influence of the Witches are the most potent threats to Macbeth's sanity and power.
The theme of power in Macbeth influences the characters' actions and decisions by driving them to seek power at any cost, leading to betrayal, murder, and ultimately their downfall. Lady Macbeth's desire for power pushes Macbeth to commit regicide, while Macbeth's own ambition drives him to further acts of violence to maintain his position. The lust for power corrupts the characters and ultimately leads to their tragic fates.
She pushes MacBeth to kill the king and by doing so fulfills the witches predictions.
Lady Macbeth pushes Macbeth to kill Duncan in act 1. She is stronger and more manly than Macbeth.
She is 100% responsible for it. At the beginning of Act I Scene 7 Macbeth decides that it would do no good to kill the king. However, Lady Macbeth totally turns his decision around by playing on his masculinity and pride.
The more dynamic person is Macbeth because in the beginning he is unsure whether or not kill the King or to remain loyal to him. However, he is persuaded by his wife Lady Macbeth, - who by the way is a static character - to kill the King. After he kills the king, Macbeth's ambition does not only drive him to do great things, it spins him out of control and begins to take over him.
Macbeth's desire for power.
Lady Macbeth was an accessory and an accomplice to her husband in the murder of King Duncan I [d. August 14, 1040]. It was in fact she who came up with the plan to help Macbeth [d. August 15, 1057] carry out the killing of his sovereign and the two royal guards without any blunders. She planned to get the guards to drink too much of drugged drinks. They then would be incapable of defending their ruler. Neither would they be capable of defending themselves when Macbeth turned the daggers on them as well.
Macbeth is able to kill King Duncan by being influenced and manipulated by his wife, Lady Macbeth, who pushes him to carry out the murder to fulfill their ambitions for power and status. Macbeth's own ambitious and power-hungry nature also plays a significant role in his decision to commit the regicide. Ultimately, a combination of ambition, manipulation, and moral weakness leads Macbeth to commit the heinous act.
She provides a foil to Lady Macbeth. Also, because she is such a sympathetic character, we are the more horrified by her pointless murder. This helps reconcile us as an audience to Macduff's killing of Macbeth later. In Shakespeare's day, a good revenge always made for a good play.
Macbeth is dazed and confused after committing the murder. Lady M has to take the daggers back into the bedroom and smear the sleeping grooms with blood herself. She then pushes Macbeth toward their room so he can get into his nightie and look like he was sleeping when the murder happened.
Initially Lady Macbeth controls Macbeth through a number of psychological techniques. However, when she hears that Macbeth has killed Duncan's grooms without her telling her to or even asking her, she realizes that she has lost control of him. She tries to get him into some kind of order during the banquet, but it is no use: he is in his own space where she cannot get to him. The relationship of these two people has nothing to do with the social conventions of Shakespeare's day (not the Elizabethan period, actually, since Macbeth was clearly written about 1605). Struggles for dominance in a relationship are an issue as old as dirt. They are still an issue, which is one reason that Macbeth still resonates with people.