In an election where the total number of votes didn't decide the election. If the election had been fought under a system where a plurality of the votes wins it everything would have been different. The campaign would have been different. More, or perhaps fewer, candidates would have stood. Individual voters' decisions about who to vote for, or whether to vote at all would sometimes have been different. Two million votes is a lot, but not compared to the size of the electorate. Would Clinton have won under that system? No-one knows.
As a Brit I think your entire focus should be on working out how you lost to the most awful, useless candidate I can remember standing for election anywhere. And then send him packing in four years' time.