The problem isn't Steve's contradictions, it is your own.
If you subscribe to subjective reality then Steve doesn't exist insomuch as he is a part of your consciousness. He might say that he does, but if you truly follow subjective reality then that is simply a projection of your own belief that he has a consciousness.
Subjective reality is an interesting concept because it is logically soundproof. You can't disprove it because any evidence you try to weigh against it can be said to support it.