Well for one there's clipping, overlapping, the shading is horrendous, some of the edges are even the same when measured, and it's not symmetrical at all.
What you need to do is put more time and care into the model. Making it more detailed, symmetrical, and making it fit into Blockland.
http://www.3dfile.io/vycG1p#file-1
Even this is better and the only thing I had to do is add a torus.
I litteraly didn't do anything.
This seems to be exactly what the OP was going for except maybe if could be more low poly.