Most multilateral institutions which are led by Western powers do serve imperialism.

Also, keep an eye on think tanks and NGOs. Ford Foundation and Open Society are known for co-opting left agendas for something pro system. The RAND corporation and the Atlas network are think tanks to spread Western narratives and right wing propaganda. To a lesser extent, don't trust human rights NGOs and pro democracy, like OID. They usually have Western donors and act on their interests.