That's a lot of "ing".
One revenges oneself against, on or upon someone else. By saying "his pursuing obsession was hurting and revenging me", you've backflipped at the last moment. "Revenging me" means you don't receive the hurt, but someone else is hurt in return, to your advantage.
How about: "his houndlike obsession was vengefully hurting me." I've cobbled 'hound-like" together to keep the image of pursuit, eg. hounds after a fox, or "to hound" someone.