You already know why, because it is and was designed to be used as neocolonial imperialist tool. I am not against the concept of an ICC but not one that was developed for these reasons and not one that allows the US and Israel to steer it. I don't think it can be reformed as its foundations are rotten. Same thing with police in the US.

Many non-Western countries, particularly in Asia, have historically been hesitant to join the ICC due to concerns about sovereignty and potential interference in domestic affairs. And their concerns have been validated. That's why some countries are making efforts to form regional human rights courts.

I've said this before, it's selective justice, that it's victors' justice. Powerful states and their allies are effectively shielded while weaker states and leaders who lose wars or fall out of favor get prosecuted. Just look at the The ICC's own docket. There's an asymmetry of power here. The court can only act where states allow it, they are not neutral and the ICC is used as a weapon.