You’re not terrible for having zero interest in people. You’d not even be terrible for having zero empathy. You are terrible only if that is not communicated properly and you toy with people, because you don’t need interest or empathy to ‘rationally’ know you’re going to cause harm that way, and that is not correct or desirable (in your case, if not for the individual per se, it is not desirable for the chain reaction that may even reach you).