depends on what chapter you're on. if you read the whole thing and still root for him I absolutely would hate you
I personally like him a little better than Moru. Moru made Jaehyuk's life a living hell for no reason. Then blamed him for everything without once considering ON HIS OWN and without being prodded that maybe humans need sleep, like an incubus needs sex. He also still cares more about himself than Jaehyuk at least in most of the rest of the story. At least Zelos does it because he thinks Jaehyuk is hurting someone he cares about. He's also an incubus and although Moru thought he was someone else he did come onto Zelos.
My exact thought process
Would you guys hate me if I said I’m rooting for Zelos (edit): guys I apologize Zelos is not what I thought he would be