And yet, I doubt you can point to any actual harm that occurred when Democrats did briefly hold both houses of Congress after Obama was elected. BTW, there never was "total control", at least not if you meant control of all three branches; the Supreme Court remained a solid conservative majority during that period. And the Republicans of course still had the filibuster, which is plenty of power to represent any "legitimate points and interests" that they sought to advance. And they were able to complain enough about Obamacare to flip the House back almost immediately in the next election.

If people vote for one party to control everything, maybe, just maybe, they had a good reason to do so. I see no reason to assume this would be automatically destructive to the country.