It's hilarious to see the supporters of Sergey proclaim that he lost for political reasons. The juries showed more support for Polina last year, remember? So politically things were better back then?
The juries didn't vote for Sergey because the song is outdated and bad and the OTT staging didn't fool them. They probably ranked it even lower because of the tacky and unoriginal staging. There are various odd jury results but most of them made the right choice regarding Russia.
The Armenian jury, for example, gave 2 points to Russia. The juries from Belarus and Azerbaijan gave 12 points to Russia. Who is more objective here? Probably nobody on the Armenian jury has a Russian husband...
The Greek and Cypriot juries gave 12 points to Russia because of a certain Greek composer. They didn't vote for the best song. They voted for a fellow Greek and Belarus voted for its neighbor.
We know now which juries just vote for certain countries and people and which dare to give 0 points to their neighbors if that's the fair vote.
I was very negative about the juries after the Periscope video and there are still many problems but things are not as bad as feared. We need further improvement of that system but the juries are clearly needed.