The right and left sides don't match with each other.
The white splatter in the bottom left looks bad, add a clipping mask to it maybe.
Take the red on the right out, or make it the same yellow as the C4D's.
Stay away from text.
And never ever ever ever ever ever use a Master Chief render.
You've got something good going, I can see what it is you wanted this to be.
KIU.