"In its records from a recent sitting, the committee for European and international issues of the Slovene National Council proposed MPs to “consider relations with Croatia in the light of its alleged NDH heritage”.
The records state that the NDH is still in a way present on the Croatian political scene and that today`s Croatia has not “paid full war compensation or apologised to affected peoples and countries”.
Secondly, NDH has nothing to do with the Republic of Croatia because they are two totally different states. RH is the legal successor to the SRH, not NDH since RH is based on ZAVNOH and SRH.
Those are the facts. If you don't like it, you can file a suit with the UN. Even the Slovenes have rejected this position cited in the article since it shoots themselves in the foot in regards to Slovene pro-Axis forces during WW2.
If we are to extend your logic, Croatia, Bosnia, Montenegro, and Kosovo can all sue the Republic of Serbia for Chetnik crimes committed in those countries.