The best thing which you have done is to revive all four major plays of Shakespeare from the perspective of Aristotle's Poetics.No doubt whenever we read Poetics, all these plays come automatically before our eyes as examples.What you have done can be summarised in the famous lines of Pope:
'What oft was thought but never so well expressed'
All four protagonists meet their tragic end because of Hamartia.
Hamlet-Noble Indecision and Procrastination
Macbeth-Excessive Ambition
Othello- Jealosy and Doubt
King Lear-False Pride and Error of Judgement
Besides Medical Metaphor, two more theories have been interpreted:
Purification theory
Clarification Theory
I think I should read all these plays and Poetics once again to enjoy your poem.A really fantastic job.Thanks for telling a lot in few words.Expecting more poems about Literature and Theory from your pen.

What a discovery..... Just joking, No doubt Found a writer with the best literature technique... Fabulos and to add Marvellous too

You have poetically summed up the tragic flws of all the major Shakespearean tragedies. It is superb. Keep it up.