Your ending sucks.
It’s kind of the universal complaint that accompanies most of the biggest games that have come out in the last couple of years. Human Revolution‘s ending was bland, Mass Effect 3‘s was a warcrime thematically, tonally, and structurally. Regardless, most of the endings I’ve seen in the last few years to games have been underwhelming to utterly grotesque. The exceptions stand out for simple reasons that most people haven’t thought about.
Fair warning, spoilers ahoy. If you haven’t beaten Deus Ex:Human Revolution, Mass Effect 2 or 3, you’ve been warned.