Agnostics...?

I switched from describing myself as agnostic to atheist some years ago. I thought that agnostic was an honest title as it declares that literally I don't know, and given that it is impossible to prove a negative I thought that was as definite as any one can get. But now I feel that, for one thing, we have so much evidence about the universe and how it works that we can say, pretty definitely, that at the least the personal, anthropomorphic god of the the abrahamic faiths does not exist, and also, given the harm and evil done in the name of religion, I am not content to be a neutral, I am ANTI-theist!