The song itself is alright.... i like the synth and percussion background, the ABBA-ish chorus is just okay, but i think this was the reason for what happened:
1. He's a bit too old for this kind of number already, which makes him look odd and out of place in it.
2. The performance, especially in the final, semt just a bit tired and uninspired, more artificial and forced than in the NF where there was more of a genuine happiness to it. Maybe he knew beforehand this wasn't gonna be his day?
3. It's too similar to Eric Saade last year, even if there's some changes since the NF, specifically to his clothing (and the fact that he's older sure doesn't help that either)
4. People are simply tired of this kind of number, a couple of years ago it would have been a novelty, but now it's worn out its welcome and i think this kind of upbeat extravagant dance-pop is gonna get low scores, and become more rare in the next few years.
5. It was Loreen's year. It's fairly typical that only one Nordic country makes the top while the others are near the bottom.