The whole thing is mono-toned.
The boarder doesn't look good.
The text is bad: both the placement, and the fonts dont fit.
Composition isn't good: centered focal
Unappealing effects: just some c4d's with adjustment layers isn't fun to look at.
Lighting is too intense, and using a soft brush is never good.
Contrast is too high.
A bit oversharp in areas. Makes the quality look bad.
Improve all of those. You can thank the Mods for being Nazi's about posts having to be "constructive enough" for me having to tear it to shreads. Normally I like to avoid that and only point out one or two things at a time so you can focus on those.