For a long time to come, the political structure of "the decline of the monarchy, the nobles growing stronger" was almost definitively set in stone, and Caesar III was powerless to stop it.
However, thanks to the foundation he had laid, the power of the royal family was rapidly increasing. Even if the monarchy was in decline, it would not fall too hard.
Once Crown Prince Caesar matures politically, he can slowly regain the voice he had lost in the early stages.
This power-intrigue game repeats itself with every change of dynasty, with ups and downs. Caesar III had seen too much of it already.
He thought he could face it calmly, but when it came to him, he begrudged it.
...
When the city gate caught fire, the fish in the neighboring pond were affected too.
The Moxi Duchy also faced an economic crisis, and their situation was clearly much worse. It's not that the nobles of the Moxi Duchy were better at internal competition, but rather because they had lost too much in the war.