When it comes to Xavi I must admit one thing especially. In his control the players started to show much better performances. I still remember that horrible time period with Koeman.

Barcelona were in serious pain back then. After Xavi came they even won a La Liga title but things aren't just going the way he would like now.
There have been serious defensive vulnerabilities and this is very likely to cost them the league title. I didn't expect Xavi to make such announcement this early honestly. I thought he would give it one more chance while the board were still believing in him. If he doesn't change his mind then I'm curious who their next manager will be.