(Image credit: Spotify) To mark its 20th anniversary, Spotify has kick-started 20 days of user data drops, from the most-streamed song of all time to the ultimate breakup banger. Alongside this retrospective campaign, the music streaming service has unveiled a new app icon, but not everyone is feeling the celebratory vibes. The Spotify emblem is arguably one of the most recognisable entertainment logos today, so it's no surprise that some users were a little disturbed by the new design (as we know, the internet hates change. Luckily for the unhappy few, the design likely isn't here to stay, but that didn't stop disgruntled critics from making their scathing opinions heard. What in the name of all things holy and pure has happened to the Spotify app icon? from r/graphic_design The new Spotify app icon sees the iconic emblem transformed into a green disco ball.…