If rights were violated then this would all be illegal. Clearly it isn't. In the US, there is no constitutional right to privacy, and any legal precedents are mostly about government surveillance.
There's new data privacy regulations at the state and federal level going into effect which is why FB made these changes, but they don't explicitly prevent this kind of data sharing from an outside company using first-party trackers to send data to Facebook's marketing platform.
You are right, of course. It just goes to prove that we are little more than slaves to the system of governments who dictate what is lawful, who usurp their position in order to bestow rights back to us that used to be intrinsically ours to begin with. It doesn't make it right however.
There's new data privacy regulations at the state and federal level going into effect which is why FB made these changes, but they don't explicitly prevent this kind of data sharing from an outside company using first-party trackers to send data to Facebook's marketing platform.