We shouldn't be frustrated. We should be concerned. Even Europe is concerned. Then again, we could argue that that's because Russia is placing missiles on its border with Poland. Americans who don't remember the cold war are likely making that argument as we speak.
What do they think Russia is doing in its negotiations, arms sales, and war games with Venezuela? And again, with Cuba?
There are others in the useful idiot category that will squawk that Russia isn't the old communist USSR, that its government has changed for the better, toward Western ideals.
Western nations don't direct their police forces to crush social unrest caused by worries over the economic crisis growing worldwide, a move that smacks of the old KGB (which, in itself, isn't surprising--Medevev is, after all, Putin's ventriloquist's dummy).
We shouldn't be frustrated that we can't come to an agreement about the missile defense shield. We should be downright nervous.