Not really in my opinion.

The poster was expressing that they're shocked, saying what a corrput state Russia was. And I don't quite understand why they're shocked and presumed that they're from the US.

I didn't try to deflect by saying "Russia isn't a dangerously corrput state because look at the US", I tried to say "Why are you shocked about Russia when your own country has it's problems with corruption too."

Hope that makes sense and that I'm now not registered as a russian astro-turfer.

When attacking Russia for a specific thing, bringing up the misdeeds of the US are a distraction, and "whataboutism".

When comparing the morality of the two nations (or criticising the "world police" status of the US as hypocritical) recalling American misdeeds is appropriate.

In the case the post was "what a corrupt state", attacking character of Russia generally, hence it's appropriate. It's worth pointing out that OJ Simpson published a book "If I did it", which could be seen as morally unacceptable too - but then there would be a difference between "that's terrible" and "America is terrible".

For some reason everyone on this site sees the term “whataboutism” as an immediate way to invalidate a statement they disagree with.

I believe OPs point was that in fact, Russia is as corrupt as other world powers…so you shouldn’t be shocked by their tolerance of cyber criminals.