I really think people blow this crying about Orcs out of proportion, there was NEVER an actually interesting villain in this game whose reasons of being a villain boil down only to "I'm an Orc, Goblin, Drow or other evil race". And saying a whole species is inherently evil effectively diminishes all evil they do because you are saying they never could choose not to do it, which reduces them to children who don't know better. People should move on and stop flooding my yt feed with identical videos repeating the same points.
It's a matter of world building. Orcs can be noble savages, or violent monsters. The main problem is humanizing these creatures. If you instead imagine a separate evolutionary path, then the race can be inherently "evil".
If orcs have evolved for conflict and violence far beyond human levels, then by our standards they would be evil. At least by the philosophy of a middle ages like world. Catholics and Protestants considered each other evil for a few hundred years. A violent species that destroys humans on sight due to their violent instincts would easily be evil. Exceptions could exist, but the mass of individuals would be "evil".
New lore: orcs are evolved from ducks. That explains everything