I don't know how you could read this page and the documents linked therein and still say "the subpoena never existed".

https://intelligence.house.gov/news/documentsingle.aspx?DocumentID=711

I especially don't know how you could ignore Giuliani's lawyer's letter to congress saying he had received said subpoena, even if the house had fabricated the existence of the subpoena.

https://i.imgur.com/DD4fN7I.png

It could only be due either to intellectual dishonesty or lack of intellect.