Goblins have language and culture and religion, and that all requires the ability to think, feel and grow. Making them evil means that either your worldbuilding is nonsense or you've made a thinking, feeling group of people inherently evil from birth. If you want a group that doesn't think, feel or grow, then do what I said in the first place and use undead.

Stop saying it's an evil deity doing these things. It's just you. You're doing these things. Don't be a coward.

Are you seriously trying to justify Boblin the Goblin being evil because of the Lich from Adventure time? One is the cosmic manifestation of the death of all things, and the other is short and green. That's not remotely the same.

And most objectively evil villains in fiction are, I shall point out, human. Nothing to do with their species. A group of human bandits and a group of goblin bandits are equally evil. And at no point have you given any explanation as to why that wouldn't be the case.

Either answer the fucking question or shut the fuck up.

Edit: It would appear they chose to shut the fuck up. I would have preferred they answer the question, but this is acceptable.