It's very much true that the ICC mostly targets countries in Africa and Asia. However, are you sure it's a problem with the court itself? It has little power in countries that aren't members or ones that actively sabotage it.

More powerful countries stall investigations, postpone penalties (or just ignore them), and overall make the ICC's job near impossible. The ICC has no real authority or executive power to do anything about it. The best they can do is investigate crimes in countries too weak to undermine it.

Perhaps it's racism or colonialism, and the court needs to be disbanded. Or perhaps it's merely fulfilling its obligations wherever it is actually able to, and would work a lot better if the powerful countries were gone or lost their influence.