Adam Clarke on Job 30:12

Upon my right hand rise the youth - The word פרחח pirchach, which we translate youth, signifies properly buds, or the buttons of trees. Mr. Good has younglings. Younkers would be better, were it not too colloquial.

They push away my feet - They trip up my heels, or they in effect trample me under their feet. They rush upon and overwhelm me. They are violently incensed against me. They roll themselves upon me, התגלגלו hithgalgalu, velut unda impellit undam, as waves of the sea which wash the sand from under the feet, and then swamp the man to the bottom; see Job 30:14.