Evil is relative and only in relation to something else, but is not an actual reality only imagined and perceived. For example a snake is not evil but in relation to man is deadly. Terms such as satan were just symbolic language for the ego or lower nature of man but man is not evil but can acquire behaviour which is evil such as terrorism.
Suffering. Let’s take physical pain. The nervous system uses pain to alert us that something needs to be attended to such as a stomach pain may be a result of food poisoning and requires urgent treatment. If there were no early warning pain we might just die without being able to prevent it. So a lot of physical pain is really an early warning system to get us to take some remedial action.
Suffering such as wars, oppression, poverty, murder and these sorts of things are due to our own choices but based on lack of harmony with the laws and teachings of God. A spiritual person will never injure, kill or harm another person in obedience to God’s laws and ensure all people have food and the basic necessities. When our hearts turn away from God, we become lower than the animals and stop caring for one other which we see universally today.