So Wilhelm II is pretty famous for being quite a jackass-arrogant and blustering while also being an insecure people pleaser. He got himself in hot water with a bloodthirsty speech to the troops he shipped off to the boxer rebellion, alienated Nicholas II with endless patronization, and got his own government to exclude him from foreign affairs by giving a rambling, emotional speech to a British reporter in 1908.
He gave the blank check to AH, and was such a fuckup, he almost looped back around to competence by trying to stop WW1 after the Serbian capitulation to most of Austria's ultimatum!
My challenge is: how could Willy Ruin Everything even more than he did OTL? Alienate AH and go to war alone? Insist on an even more ambitious navy that beggars both Germany and Britain in the arms race before the war starts? Become fascinated with chemical/biological warfare and add smallpox shells to the devil's brew of WW1?
I'm interested to hear people's ideas.