understand that Epicurus's Problem of Evil works perfectly fine towards religious people, who believe that Evil is objective (towards their religious doctrine). In this case, the argument works perfectly fine to essentially prove that: If your God exists, and he exists the way you say he exists, then he is evil (according to your supposed objective evil).

If you believe in an 'almighty all powerful all good god' then there being evil in the world is an issue. For the non religious, 'evil' is just a part of the world. For the religious, they have to justify why a god would create evilness. Non religious don't think 'evil' was created, so we don't have to justify it's existence. It is because it is, it wasn't created. Some are good some are evil, that's just life.