1)
Why did He save them many times?
1.
Rashi (from Shocher Tov): Many times they angered Him, and He was slow to anger, and saved them.
2.
Malbim: After He saved them, they returned to do evil, like it says throughout Shoftim.
2)
What was their counsel?
1.
Radak: It was a bad counsel, to rebel against Hashem. Malbim - it was not due to desire, rather, heresy.
3)
What is the meaning of "va'Yamoku"?
1.
Rashi: They became lowly.
2.
Malbim: Via sin through crooked intellect, they became totally crushed.