1)
Why does it say "Ad Mah"?
1.
Malbim: When [the author] sees how long Malchus Beis David is Batel, he prays [how long will this be?!]
2)
Why does it say that Hashem hides?
1.
Radak: It is as if He does not see the affliction of Galus.
2.
Malbim: He hides His face from saving.
3)
Why does it say "Tiv'ar Kemo Esh Chamasecha"?
1.
Malbim: You are still infuriated with the generation.