I've certainly found this for lower graded work in my sector (local government) - that people don't know how to fill in a form, or use the person specification to complete an application form. We rarely, if ever, use CVs, because you can't guarantee people provide you with the same level of information needed for shortlisting.
But the boot is also on the other foot for employers, I'm afraid, whose singular inability to make the application process easy causes a whole welter of issues. Just a few I have personally experienced.
An employer not stating a salary range - "we want to pay you as little as possible"
An employer not stating when interviews will be, or calling with 48 hours notice of an interview and not being able to understand why you can't rearrange everything at short notice. Or turning up 2 hours late for an interview and then asking everyone to stay 2 hours later in the day to accommodate her and binning applicants who couldn't.
An employer with a frankly unrealistic expectation of 2 professional qualifications in 2 completely different field and a derisory salary. This advert ran - at considerably expense to the organisation - 4 times in the Guardian.
An employer asking questions and setting tests at interview that were absolutely nowhere mentioned on any part of the JD or person specification, and then accusing me of wasting their time by not having the ability to undertake the task. If you're getting the "wrong kind of applicant" for the job, it might actually be partially your fault.
Telling me the role was a fixed term contract role rather than permanent as advertised as "no-one would have applied otherwise". Or offering me a fixed term contract "to see how we get on" - when I'm already working on a similar level in a similar role on a similar salary and then get aggressive and accuse me of "wasting their time" when I refused the role. Or offering me a lower salary than advertised "because I couldn't get the budget approved" - I even offered to work shorter hours for this one, but was told, "No, I need someone full time". That was another re advertisement.