I don’t think you understand the extent of the issues around getting the Russian vaccine approved. Their development and manufacturing is flawed on a completely different scale to any of the AZ issues, with these flaws highlighted by multiple regulators, in multiple countries with clinicians also expressing their concern in
an open letter to the Lancet, the journal that first published the Sputnik trial results.
You should also note that the AZ issues - although much less significant - were reviewed by multiple regulators and responded to in an open and transparent manner, resulting in approval from every regulator they submitted a license application to. None of which applies to the Sputnik vaccine. Instead the manufacturers have bizarrely been picking fights with regulators and slagging off other vaccines on Twitter. To be honest, at this stage they’ve probably exceeded the worst possible predictions of dishonesty and unreliability made by any of the Western media.
If you want to learn more about the issues around Sputnik and don’t trust Western media,
here’s a good summary published in the Moscow Times.