For me, it's the inability to see the source UNLESS YOU EDIT THE POST

You can always go to Tag History to see the source too

I would rather see the source without needing to click on something

the stupid captchas. they're incredibly bad, obnoxious and don't work correctly most of the time.

Even going to tag history, does not mean that you can see the source.

Sometimes people just plain don't put a source.

Or they use the same dead 4Chan thread link as the source and refuse to find the source

The inability to delete your account or change your name if you want to. Idk the justification, surely it can't be that big a deal.

not being able to search your favorites

Not being able to post videos

That's been a problem for some people here, DES1RE is one of those people

Not being able to see the source from the go and the lack of explanation when posts gets deleted

Seconding this.

Getting mails from various people.
- Guys asking to rate their GF and what I'd to her
- Trans asking to rate them and what I'd do to them

I answer with a "Oh sure, send some pics/clips" and they neither answer back nor have anything posted.

-Not being able to upload a batch of files at once like in imagefap.com
-Not using the text captcha, the one where you only write not the one with the slide.
-Not being able to search the favorite files using tags or a search bar for that area only.
-Not being able to see what files were deleted or why (some videos get deleted because the time surpass 3min).