I have quoted you examples to prove that relations with former USSR were cordial during Bhuttos time.
Which refutes your claim of US "control" of Pakistan. Bhutto proved Pakistan could have left the US bloc for the USSR bloc at any time. This could not have been possible if the US "controlled" Pakistan (as if the US would even care about "controlling" Pakistan. Pakistan was not exactly geopolitically important from 1947-1979).
Regarding 1977, even if you absolve Bhutto of the blame for what happened, the notion that the US caused Bhutto's downfall is ridiculous.