An ordinary person can wear energy resistant armour, or hunker behind a barricade. We don't tend to allow the ability to cause a lightning bolt to arc down from the sky or for you to instantly incinerate people, powers are expected to have travel time.

In stark contrast, someone who can teleport can instantaneously reach a target, or avoid an attack. If there are no limitations. Someone who can stop time can kill an opponent who does not have the ability to interact with the power to stop time without any complications. Someone who can manipulate gravity can directly crush someone to death unless they too have a power to nullify or interact with gravity. They're called not-interactive powers for obvious reasons, and most fighting systems (including the one we use here, T1 Eden) ban their use.

Most powers can be extended to the point of being broken for Arena, in other words, but irregardless of context or setting, some are almost inherently broken because of this lack of interaction for the target. There is room for subjectivity in literally all aspects of human endeavour, but you can still determine that some powers are far more broken than others. These are the things we label overpowered. I'm not overly concerned with whether you consider your own setting too complex for us and have decided that no one here is capable of understanding said complexity in your setting. I find it funny, but not concerning.