I'm worried that I think I am an animal abuser
Why do you think you are an animal abuser?
I've gone out of my way to see injured animals.
Well, abusing animals is wrong. If you are getting some sick thrill seeing abused and injured animals, then seek professional help.
No worries. I was only looking.
If you were only looking to find injured animals and not actually enjoying them, then I believe you're okay. Animal abuse is horrendous, and that is clearly not it, thankfully. How about taking it a step further and trying to help these injured animals?