Upsetting russia was seen as bad plan when trying to normalise relations with them and the rest of Europe (Pre Crimea) The idea was to intertwine economies so that was would never be feasible.

World is dependent on China for manufacturing

When the punishment for countries is economic (As no one would dare go to war with a Nuclear power) and you depend on their economy you don’t need have much to gain do you? Just ruins everything. You could go for specific people I guess but their countries will just ignore it.

Israel is/pretends to be normal with most of the world. So will probably actually do stuff if they lose.

Then the obvious. It’s all political theatre and no one actually cares about genocide.

China and Russia are permanent members of the security council

Have Russia and China joined upto ICC?

Lots of people and countries are claiming Russia is committing genocide and are investigating that possibility.

Several nations and legal institutions have also classed China’s actions against the Uyghur as genocidal.

However, as far as I’m aware neither Russia or China are signed up to the ICC so there’s not much point in using that body to penalise them.

Israel is though and your claim there’s no proof is literally true (in the sense you used the word ‘proof’) but there is plenty of evidence that Israel certainly has genocide very much in the forefront of their minds when members of the Israeli government suggest nuking Gaza, or creating ‘no go’ areas for Palestinians in recognised Palestinian areas that just so happen to be where Palestinian farmers grow and harvest food. Israeli historian of the Holocaust Omer Bartov warned that statements made by top Israeli officials “could easily be construed as indicating a genocidal intent.”