I'm willing to bet everyone in the UK had election burnout even before the polls opened, and it's not over yet. The Liberal Democrat's share of the vote increased slightly over the last general election, but because their support is spread over the whole country they actually lost a few seats in parliament. And yet, they're also the only party to emerge from the election with any power - not the power to rule, but the power to choose who does.
Given the huge gains made by the Conservatives, I think you could argue a Lib/Con coalition is 'the right thing' from a democratic perspective. Much as I hate David Cameron, I wouldn't hold it against the Lib Dems to take a piece of his government. What I would worry about is the longer term effect of the only truly progressive mainstream party getting in bed with the party of toffs and Daily Mail readers. In the next general election, might people then feel like the Lib Dems had nothing to offer anyone?
On a happier note, although I've stated before why I won't vote for the Greens myself, I think more left wing minority parties in parliament can only be a good thing, and I'm glad to see Caroline Lucas become the Green Party's first ever member of Parliament.