Imo, some sharpening would've worked, and the render needs to blend more with the background. Also, I don't really like the background. Aside from that, it's great.
Those foreground c4d's are too much tbh, they overwhelm everything else. The render should be the focal not the foreground c4d's, for your depth blur some of the larger c4d's in the background. But have some smaller sharper ones in and around the render, I also think the lighting needs more work, good attempt though