Looking for some help with Latin

I would like to know how to say:

Despised by the despicable

. . . in Latin, for reasons that will soon be clear, if they're not already.

It seems that everyone I ask has a different answer. I've seen:

Despectus (Dēspectus?) despicabilibus (dēspicābilis?)

And:

ab despectivis contemptus est (meaning, I was told, "By the despicable many, he is despised."--I kinda like that).

Today, a local Catholic priest suggested:

Contemptus per despectivus

Any guidance anyone can offer would be greatly appreciated.