Puh-lease. Saying this is like saying the last guy on the list of billionaires is struggling. Don’t sell yourself short. In my experience (first of three IMs was ’04), no one has ever asked me how long it took to finish the IM after they realize the distance. Awesome job because all the training plus a finish requires a Herculean effort.
I’ve said that And the finish is anticlimactic because, as you noted, you are hollow, both physically and mentally.