Ill just copy paste from another thread.
Guardiola deserves a ton of credit for building that team. When he came in Barcelona had just finished 17 points behind Real Madrid and had barely qualified for Champions League. He immediately got rid of half the seniors, for which he was highly criticized at the time - Ronaldinho, Deco, Thuram, Zambrotta, Edmilson etc all sold off. He promoted Busquets, brought in Alves, Keita, Pique and gave Iniesta a fixed position on the left, who had been utilized as more of a handy man up till then. He also got Henry to perform who hadn't had a good first season. In his first year they won every trophy in club football. I hear people say their grandmorther would have won with that team but what they forget is Pep built that team with his own hands which required taking some ballsy big decisions for which he took a lot of heat in the beginning. He also got them to play like never before, tiki taka with pressing tactics.