I can't even remember the last time the team I rooted for won the final.
Obviously I rooted for Juve in 2015 and 2017
Rooted for Liverpool in 2018
Rooted for Atletico in 2014 and 2016
Rooted for Dortmund in 2013
Rooted for Bayern in 2012
I guess the last time was probably 2011, where I rooted for Barca over Union.
I don't know if I just have shit luck, or an annoying tendency to always support the underdog.