Who says so?
Rashi: My nation Yakov, in Galus. Radak - the Navi asks why they say so. Just because Galus is long, do you say...?
Malbim: Yisrael, due to the length of their Galus and the serenity of the Resha'im. Their heart ceases to believe in salvation. Amirah is saying simply; Dibur is at length, with many Mishpatim, connections, reasons and proofs.
What do we learn from "Nisterah Darki me'Hashem"?
Rashi: My way is hidden from His eyes, what they subjugated me and ruled over me, those who do not know Him.
Radak: He does not supervise over me and the afflictions of Galus that I suffer. Darki is my matter, like "Madu'a Derech Resha'im Tzalechah" (Yirmeyah 12:1).
Malbim: Yakov, the masses of the nation, say that Hashem does not know man, and does not supervise over his deeds at all. "Hashem" refers to the Creator; they do not attribute to Him Hashgachah.
What is the meaning of "ume'Elokai Mishpati Ya'avor"?
Rashi: Was removed from in front of Him the good reward that He should have paid to our fathers and to us.
Radak: The judgment that Hashem should have taken against the Resha'im who subjugate me, it passes from being recalled in front of Him, and He is not concerned for it.
Malbim: Yisrael, the Gedolim of the nation, know that Hashem has no lack of knowledge. They make a philosophical claim - since Hashem's knowledge does not change, there is no room for choice, reward or punishment. Elokai hints to Hashem's Hashgachah.
