The first is the demo graphics text, as already mentioned, when you put text in your images you should either make it fancy or not put it.
The second one is the render's quality, as it's really blurred.
Everything seems super blurry.
The render looks like it was sharpened to much.
Those flare lines I feel could have a more glow effect or do something more to make it look "depthened" if you know what I mean? Maybe not x.x
That c4d next to his head looks like a brown shit on brain xD
Sorry about that
But the flow is nice ^_^