Incompetard 

A person profoundly dysfunctional, possessing self-reinforcing characteristics of both incompetence and retarded mental capability.

She looked so promising on her resume, but after 30 seconds on the job we all knew we had hired an incompetard.

Incompetard by YAWA April 18, 2015

incompetrumpence 

When arrogance supercedes both integrity and intelligence on a global leader

Your so incompetrumpence

incompetrumpence by Patrick DeBolt February 17, 2017

incompetude 

Characterized by lack of skill coupled with an arrogant demeanor; preemptive indignation directed toward a person who may or may not be questioning the subject’s inability to carry out a duty.

“President Trump’s righteous tweets about lying to the public about the early dangers of Covid-19 showed an insecure leader with great incompetude.”

incompetude by PleasurePilot December 20, 2020

Priveleged incompetance 

Gaining access or power without consideration of ability based on financial status.

Betsy DeVos has no experience as an education administrator but she has a ton of money for vote buying and so her priveleged incompetance got her the job.

Priveleged incompetance by Lizzy Mac February 8, 2017

incompetant 

Spelling used by douches who enjoy taking the focus off their intended target and onto their inadequacies in spelling a word about inadequacy.

Generally said person will also use words such as "useless", "stupid", "idiot", and "retard" in the same sentence, providing listeners with a wider description of the writer.

I hate my job, im managed by incompetant idiots who are too stupid to see my talent, and theyre useless retards, unlike me

incompetant by dumbtabulous November 12, 2009

incompetude 

Characterized by lack of skill coupled with an arrogant demeanor; preemptive indignation directed toward a person who may or may not be questioning the subject’s inability to carry out a duty.

“President Trump’s righteous tweets about lying to the public about the early dangers of Covid-19 showed an insecure leader with great incompetude.”

incompetude by PleasurePilot December 20, 2020

incompetance 

spelling fail of incompetence

'I have spelling incompetance'
'we can tell'

incompetance by george085 March 10, 2010