An oldie but a goodie
 

" Note to newbies: I would take Mr. Connor's "articles" with a
large measure of salt, anybody who tells you to cast a 6wt or
heavier line on your 3wt has got a screw loose.

--
Ken Fortenberry "

In your case, dumbo is not an insult, merely an accurate
description of your condition. So is "asshole".