[King Prout]

I prefer: "Alas, it seems I failed to express my point to you clearly enough."
It *denotes* poor communication, but quietly implies the recipient is a moron.

[stultorum]

""Alas, it seems I failed to express my point to you clearly enough."

With emphasis on "clearly enough," or it will denote that you failed in communicating your thoughts.

Do you mind if I plagiarize it?