# The clods of the valley will be sweet to him

"He will enjoy being buried in the dirt of the valley". Job imagines that the dead person will even enjoy the dirt that is put on him. This means the wicked person will even have a good death and a nice burial after a fulfilling life. 

# all people will follow after him, as there were innumerable people before him

"a huge number of people go to the grave site; some go in front of the procession and some come behind"