I might be biased because I got along reasonably well with him while chatting during the game, but of the four non FIR powers, I look at Germany as being the LEAST responsible for the eventual outcome, diplomatically at least (some of the tactics i think needed some work tho)
(I'll also note that for Turkey as a power, it was much more that Turkey #2 inherited basically a lost position... but Turkey #1 had a poor game IMO, with substantial issues surrounding 1902 play as well as being unable to avoid a 1901 that went overall quite poorly (A/R friendly, Italy in Lepanto mode)