It’s become political, it wasn’t always. It’s become crap, it wasn’t always. It’s become funny, it wasn’t always.
In the 60s to the 80s, the UK used to submit songs from successful bands. Bucks Fizz (not sure of the US knows of these) and a few others, Brotherhood of Man, Lulu, Sandy Shaw, Dana. Other countries too, Abba, Celion Dion. UK winners and runners up would often have quite successful careers off the back of wins. During the 80’s the UK’s popular music declined into a myre of Stock Aitken and Waterman songs, and those bled out into the competitions entries. They lost heavily a lot of times during that period, with a disconnect between what was good, and what was popular (because SAW churned out hits for children, which were bad). Some other countries did take it seriously, and it was a chance for their foreign language hits to make it internationally.
The relentless losses of the UK, meant it became much more an object of fun, and it was often through the UK where the rest of the world got its coverage. I think at this time the members expanded, with the addition of eastern europe into the mix, and diluted the pool much more. Non EU countries are now in there, such as Turkey and Russia and non European, but European like, such as Israel too. Even niche almost rogue states such as Belarus enters.
At some point in the 90s Ireland had a lot of success, winning three of them in a row, and the downside of which is that you had to host the next one. It was costing them a fortune. My Lovely Horse, and episode of Father Ted is their version of Ireland trying to throw the competition because they kept winning it. This just added to the fun of it.
The more musically global countries, UK and Ireland, sort of stopped putting too much effort into selecting their winners for a while. Then they got bored of that and started competitions which inevitably got really bad bands entered. They tried real successful bands a few times too. Bonnie Tyler was the 2013 UK entry. However, that was too late, because it had become political.
With the newer states entering the competition, they often had their old enemies and new friends to vote with. They voted in blocks. It became a place to show their countries opinions on the behaviour of others, usually the UK. Often getting really low scores and even getting 0 points in 2003.
Inside Europe, the people I’ve known in some places use it as a great fun celebration of cheesy music. In the UK it is either ignored, an object of fun, or another bitter faded glory for someone to care about.
If you really want to realise how the UK thinks, I really have no doubt that at least a million people voted to leave the Eurovision song contest in 2016…