Sorry - just re-read and have to challenge this statement.
Xavi managed them from 2021 - 2024. He won 1 league title (in 2023), 1 Supercopa, and no CLs. Are you saying that was the best couple of years for Barca since 2009? His first two seasons they got knocked out of the CL in the group stages (first time that had happened in consecutive years in the modern era), and then got knocked out of the Europa league in the QTR finals (by Frankfurt and Ten Hag's Man U respectively). In 2024 he was fired. Before he was fired he said he'd leave at the end of the season as he brought too much tension and it affected the players. He then changed his mind, but they sacked him anyway. That is not a managerial pedigree, especially as he did that at Barca where he was a legend. Other than that he has only coached in Saudi. Like I say, he'd be a big gamble. World class player - yes, Barca club legend - yes. Manager potential ... hmm.
Barca La Liga titles from 2010 - 2020 (10 years before Xavi): 2011, 2013, 2015, 2016, 2018, 2019.
Champion League wins in same period: 2011, 2015