Who is to blame for Macbeth's downfall?

Writing prompt

Macbeth himself, Lady Macbeth and three witches are to be blamed for Macbeth's downfall.

Explanation:

The three witches predicted that "Macbeth" will be the King of Scotland. Thereafter, Macbeth started becoming thirsty for power.

Macbeth was not a wise man and got convinced by his wife, after she called him a coward, to murder Duncan. Macbeth even killed Banquo who was his best friend. So, he is responsible for his acts.

He did all this only because he wanted the power of being a king. Though eventually he was skeptical about Duncan's murder, he got convinced by his wife to murder Duncan. Thus, both the witches and 'Lady Macbeth' are liable for his downfall.