Both things can be true to varying degrees. Russian propaganda exists but it wouldn't be nearly as effective if it weren't for our elite fumbling so badly.
Yes, every important organization (nation, religion, corporation) does PR. Its normal and healthy to have some public image management when competitors may try to destroy your image for their own gain.
This is a far cry from having a coordinated disinformation campaign to cause political instability in a foreign country. The evidence of Russia doing this to any effect with Trump or Brexit is extremely scant and circumstantial. Such a campaign would be massive, well beyond the capacity of a hidden conspiracy. It would involve entire media companies and NGOs. There would be far more smoking-gun evidence than the current standard of "guilt by association with someone who spent some time in Russia".
Wasn't one of the main leave campaign organisations (Leave.EU?) funded by Aaron Banks who recently lost a libel action against a newspaper that accused him of receiving funds to pay for this from the KGB?
I expect it would be quite hard to prove beyond reasonable doubt without the security services getting involved in giving evidence but the fact that he lost means that on the balance of probabilities the story is true. Maybe Cadwallr should have burgled his house to find the suitcases full of roubles!
This is a far cry from having a coordinated disinformation campaign to cause political instability in a foreign country. The evidence of Russia doing this to any effect with Trump or Brexit is extremely scant and circumstantial. Such a campaign would be massive, well beyond the capacity of a hidden conspiracy. It would involve entire media companies and NGOs. There would be far more smoking-gun evidence than the current standard of "guilt by association with someone who spent some time in Russia".