This guy is unable to spell and has no command of the (written) English language.
This 'guy' is, therefore, part of a sizeable majority of the UK.
Questioning the judgement of authority is absolutely correct and thwarts tyranny, surely?
While I agree that examiners have the march over pitiful me in terms of experience and judgement, they are not excluded from the human traits that afflict us all at times. Fallibility is one of those traits. This 'guy' is merely exercising the rights provided by the CAA.
His/her reasoning may be questionable, as is his/her public airing before the resolution of his/her grievance, but this doesn't make him/her a bad pilot.