This is the manager who won Champions League with a team that lined up with:
Dudek, Finnan, Hyypia, Carragher, Traore, Alonso, Gerrard, Riise, Kewell, Garcia, Baros.
Players like Josemi, Nunez, Cisse and Smicer also played a part in their campaign. This is a genuinely awful side compared to teams they faced (Capello's Juventus, Chelsea, Milan), mostly assembled by Houllier (Alonso and Garcia are the only Benitez buys in here). He had already proven that he can get the best out of players, especially in the short term.
He's basically done the same thing at Chelsea now. He hasn't proven that he can build a great side and sustain it long term which was the main issue Liverpool board had with him. His 2007-09 team was really talented - Reina, Alonso, Mascherano and Torres were all great buys and they had some decent players like Agger, Skrtel and Kuyt too. Then it all went wrong when he had to add the last ingredients to the team - he tried to sell Alonso and replace him with Barry, eventually sold Alonso and replaced him with Aquilani, bought Keane for £20m and Johnson for £18m and generally lost the plot. It'd be unfair to judge him on his time at Inter because it was a short spell and he wasn't allowed to make any changes which is why I think it's ridiculous when people say that he 'destroyed Inter'. He didn't do anything to them and they required a rebuilding work even though it was a CL winning team.