Thank you for sharing your email to Vanguard.
I am in a similar position, retired and looking
for income! After reading your message, I too sent a secure message to Vanguard, with substantial copy and paste from your email. I added a few caustic comments of my own alluding to the disclaimer that Vanguard provides that requires the new investor sign off that he/she has read the prospectus before investing. I suggested that Vanguard require the same from the fund manager, especially in light of such
negative performance starting with his tenure!

If I receive a reply, I will post it here!