It is easy to fall into the trap of using the same old terminology when someone is being unpleasant, but there are a wealth of synonyms available to us. If someone is being an abrasive asshole, they could also be described as a prick, a jerk, a bully, or a tool. If you want to get a bit more creative, you could refer to them as a festering wound on the face of humanity, a soulless husk, or a mule-headed goon. Just remember, using derogatory terms to describe someone is never productive or helpful, and it is always better to focus on positive, respectful language.