Mahari Kara: Until now, even if you sinned, Hashem was your only King, he did not allow other nations Lehizakek (to confront) you. A mortal king, even if his nation sins against him, it is disgraceful if another nation confronts them. Now that you chose another king, if you sin, Hashem will not answer you.

Malbim: When you cry due to the yoke of your king, which you cannot cast off, I will not save you, for you chose this!