I have not said that. The decision to go to war by Austria set in motion a chain of events that ensured all led to war. This decision was purely up to Austria, nothing forced her to take the step or for Germany to support her.Sure, the Central Powers and the Central Powers alone wanted a war...
The Franco-Russian alliance was in no small part due to neither nation wishing to find itself kept in isolation as Bismarck had with France. The feeling in France from 1871-1892 is not really different to that of Germany feeling encircled in 1904-1914.
The Anglo-French Entente solved problems for Britain on a global scale, any agreement with Germany could not ensure the same thing. Britain did look to Germany first - Chamberlain - but the interests of the two nations were not the same, Britain would not fight Russia over a German issue and Germany would not want to fight France and Russia over a British colonial issue. There is also the poisonous effect of Tirpitz, the Navy League and the Naval Laws directly naming Britain as its target and future enemy.
As to what could be changed to make things successful in 1914, I think September is too late and that things earlier have to be considered to stand any chance of Germany winning. Entering war on the worst terms and uniting your enemies was a bad start, having generals who disliked each other in command of adjacent armies was another major problem.