No, atheists do not hate god. Atheists do not believe that god exists, and it is not possible to hate something that does not exist.
An atheist is someone who does not believe that any gods exist. It is not possible to hate something that does not exist, therefore atheists do not hate god. They might hate the idea of a god, but this is not the same as hating god.
For example, if Thanos from the Marvel Cinematic Universe existed, most people would hate him, but since Thanos does not exist, they do not. They might hate the idea of Thanos – since Thanos wanted to kill half the universe – but it is incoherent to say that they hate Thanos. The same is true of Voldemort from Harry Potter, and Sauron or Morgoth from The Lord Of The Rings. Most people would hate them if they did exist, but they don’t exist, so no-one can really be said to hate them.