I think Andy did as well as he could and he deserved better. But we all know why UK performs poorly in the last years.
1 - No friendly neighboring countries (well maybe except from Ireland ?) If you guys participate seperately (like, wales, scotland, etc) you'll do better.
2 - UK being perceived as 'non-european' from central europeans perpective. So you can't even get points from western european countries.
3 - lack of interest in the whole affair. I'm not sure about this, but did andy promote his song in other european countries ?
unfortunately, yeah, eurovision is no longer a 'music contest' (for a long time actually) but I still find the whole affair entertaining