I understand the feeling. People don't always deserve compassion and/or respect, esp when I don't get it myself, but I try not to stoop down to their level of harshness and rudeness. I try to be the bigger better person. I'm not always successful, but I try.

Also, more importantly, when I respect others, I feel good MYSELF. When I intentionally mistreat others, I usually feel like crap.

They may not deserve your compassion, but you deserve some peace of mind, so ...