Russian disinformation campaigns are basically everywhere in Western democracies at this point, they're just hard to measure and to formally pin on the Kremlin directly.
It's a bit trickier to have a stable and efficient disinformation apparatus in place when you change governments every 4 years. Whatever is directly supported by the government would have to be supported by both the Trump and the Biden cabinets, or start from scratch every fourth year. The Kremlin doesn't have that problem.
Of course, the US military and certain other institutions tend to run their own side show. We all know the US was tapping phone lines in Berlin for decades, and there's little reason to believe they have fundamentally changed.
As a European, I'm just somewhat more worried about Russia at the moment, considering their support for the far right, successful effort to get Trump elected, the war in Ukraine, and all that. But by all means, I'm not naive to the US either, and I'm not sure why you would assume that I am.
That's definitely true, but America is different for their internal affairs than for their external affairs (as is any country). America's habit of meddling with other countries is a bipartisan effort.
Of course as an European I'm also more worried about Russia and China as ideologically they are more distant to us.