To me evil implies culpability, you could start there. A deity that had both limitless knowledge and power, would also have limitless choice, if designed a world with ubiquitous suffering and created that world, then that to me would be evil, but of course such a being’s culpability would not end there, as simply allowing that suffering it could prevent would also IMHO be evil.
FWIW, a lion killing a baby zebra to feed its cubs is not evil, as the lion is not exercising choice in the way I understand it, and cannot therefore be culpable for it’s actions. A human choosing to shoot a lion just for the fun or thrill of it is making a choice, we could go on forever, but evil requires a being or entity to choose to act in a way they need not.