Third party recruiters are the number one pain of the process. They don't respect candidates; they don't want to hear about your goals or your search constraints; they just aggressively talk over you. And I'm even talking about the so-called 'good' recruiters that you get referred to by word of mouth. Even they will break your heart.
The second pain point is well known: everyone uses different online application portals, and everyone has different requirements for manual data entry. I would have expected by now that applying at any company is as simple as just uploading a resume and clicking through some boilerplate agreements or ethnicity surveys that we would all be wise enough to always opt-out of. But I'm still dealing with application sites that look like they were built in 1995 and require upwards of 30 minutes of manual data entry.
Apps that could alleviate the pain of these issues would be way more valuable than organizational apps. The pain of the disorganization is just not that meaningful.