# Why are you still being beaten? Why do you rebel more and more?

"You keep doing things that Yahweh has to punish you for. You continue to rebel against him." 

# you

Here the word "you" refers to the people who live in Judah and so is plural. 

# The whole head is sick, the whole heart is weak

"You are like someone whose head is wounded and whose heart is weak" or "You are like someone whose whole mind and heart are sick"