How does Shakespeare present dark consequences in 'Macbeth'?

Shakespeare presents dark consequences as inevitable in Macbeth through mirroring scenes.

•  For instance, the play commences after a barbaric battle against the Norwegians, although the Thane of Cawdor is said to have betrayed Scotland. 
• This parallels with how his predecessor, Macbeth, betrays Scotland (King Duncan) by committing regicide.
•  Moreover, another mirroring scene is when the witches tell Macbeth the prophecies and he acts upon them in Act 1, Scene 3 which is synonymous to when the witches offer Macbeth a set of apparitions which also determine his future and he acts accordingly to them (thinking that "no man" from a "women's
•  The mirroring scenes give a lack of control to the audience and suggests the witches, who begin the play, have sealed Macbeth's fate long in the past before anyone can notice to change it.The power of the witches are evinced through the mirroring scenes as they are later called "weird sisters" which is a derivative of the word "wyrd" thus meaning sisters of fate. Shakespeare makes the witches the one to hold accountable for the mirroring scenes which would appeal to a Jacobean audience. 
• Macbeth turns an eye towards the supernatural and disregards the warning signals. Shakespeare's intention may have been to appeal to some members of the audience who were interested in witchcraft like King James I, who even wrote a book on his finds ('Daemonologie').
•   The audience may feel rather helpless and nervous as to what the consequences are as the Thane of Cawdor's head is brought to Duncan which may cause the audience to feel as though Macbeth will experience the same punishment thus evoking a sense of inevitability.

Understand that the mirroring would have appealed to King James I as he was a direct descendent of Banquo, and we don't hear about what is mirrored after Banquo's prophecy but only see Macbeth's.

Shakespeare presents dark consequences in 'Macbeth' from guilt through the use of ...
Please find my essay on theme of guilt in 'Macbeth' here.

Dark consequences are presented through the use of soliloquy
-Fear of danger from the unknown
-Macbeth has several which suggests PTSD
-Unknown of witchcraft

Consequences are not dark as shown through happy ending
-Tradegy ending on a good foot
-Malcolm on Throne in Scone, traditional values being followed which means justice has been brought about as often what was believed to be occurring over long periods of time was correct, like religion.