Why Do the US Generally the West not Like the Iran China Strategic Partnership Agreement

The news of the IranChina strategic partnership agreement made numerous headlines in the world media. There have been many speculations and rumors about this agreement. The US and its allies and their media arms have clearly shown their opposition to the deal. They have been trying to spoil the agreement or make it look bad by creating lies and rumors about it, primarily through campaigns on social media. Why do the US and generally the West not like the deal