Russians were clumsy and stupid about what? No evidence has been found to suggest that Russia interfered in the USA federal election, and the USA intel report claiming "high confidence" also says next to its confidence meter that "high confidence" does not indicate it is fact, and is not the same thing as certainty. So, this G&M article is completely false in claiming that USA intel agencies concluded that Russia interfered in the USA election. USA intel agencies simply have never concluded that.
And remember how fervently people were claiming '17 agencies agree' that Russia interfered... and then it turned out that there had been no '17 agencies' report at all, and that entire claim had been a propaganda myth all along.
Don't get suckered by the constant propaganda that Western news media is churning out.
There has been no evidence or outright assertion by USA intel agencies that Russia interfered in the USA federal election - that noise is just coming from news media and politicians.