Is there any information of Hitler's thoughts about the others Central Powers leaders(Kaiser Karl,Tzar Ferdinand and the Three Pashas)

[l.ceresoli.lc]

I just saw the Out of the foxholes episode mentioning the live of the Former Kaiser and how neither Hitler nor Wilhelm held the other in high regard
But what about the other wartime leaders of WW1?

[obiwanbul]

Tsar Ferdinand lived in Germany and enjoyed a rather high standard of life until his death in 1948.