If you give a man a fish he will eat for a day, if you gave him a fishing rod he'd probably go on freelancer.com and tell you he was an award winning fishing mogul with a fleet of 40 ships ready to do the best work he can for you for a dollar.
The client see the bottom line and goes for the best price. Get's landed with somebody who can only just paint a smiley face using his own feces, get's burnt having being oversold and under delivered. Never to return to the site and hires a 'real' person anyway.
I know beauty is in the eye of the beholder and is subject to opinion but the site does nothing to stop false accounts being set up with other people portfolio's, Nigerian scammers looking for you to sell things on ebay and the 'exams' they have are ridiculous, oh let's see, can I Google the answer? Yes, yes I can, wow I passed, yay, that must mean I'm a professional now. They've probably hired a 'professional social media expert' for a dollar to try and stem the tide of crap reviews on sites like this...(waiting for reply)
If you want someone with 'l33t' skills by all means go to freelancer.com however if you want a professional, try anywhere else, I hear there are some descent designers who live under rocks...