Hahaha, yeah.
But at least is shows a different side of Raiden. many people always see characters like him, as "perfect", and this just shows he's not. Even through the original games and movies, Raiden was always criticized by other "beings" because of getting too involved with the Earth-lings.
If anything, it would make for an interesting Raiden next game (?) as he tries to redeem himself and amend his mistakes. In the flashbacks and through the game, he's shown to really care for Liu Kang, so he dying because of his fault and cursing him too; probably had an effect on him as a "mentor".