Who Was To Blame In Shakespeare's 'Macbeth'

Macbeth runs out of the room with bloody hands and a guilty conscious! His wife tells him to go clean up and dispose of the evidence but he cannot move, he’s froze in his steps! So many thoughts going there his mind, but why did he do it? You can clearly see that he regrets it, so why did he kill the king? Was it for himself or was Lady Macbeth’s pressure to much so he did or maybe was it the witches put a spell on him? I

I have done my research and I strongly believe that it was his wife’s fault she pushed him into killing King Duncan! So first off most people won’t realize the hold a wife has over her husband,until they're married! In one part of the book she called him a “coward” and said he was “ not a man” and tell him he was no good