FAIR on Bolivia

Fairness and Accuracy in Reporting (FAIR.org) is the source I trust most, everything is fully referenced, and they have written extensively on Bolivia.

On the Coup and the Interim President

https://fair.org/home/the-bolivian-coup-is-not-a-coup-because-us-wanted-it-to-happen/

https://fair.org/home/western-media-whitewash-bolivias-far-right-coup/

CEPR (Center for Economic Policy Research...another totally reliable source) analyzed the election results, found no evidence of fraud.  The researcher was interviewed at FAIR.org:

https://fair.org/home/years-from-now-itll-be-clear-to-everyone-there-was-a-coup-in-bolivia/