Look at that set of numbers, each describing ratings that have gone down? (4,2,3)

'ratings that have gone down?' is the definition.
I can't judge whether this definition defines the answer.

'look at that set of numbers each' is the wordplay.
'look' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'at' is a charade indicator (letters next to each other).
'that set of numbers' becomes 'stats' (I can't explain this - if you can you should believe this answer much more).
'each' becomes 'ea'.
'lo'+'stats'+'ea'='LOST AT SEA'

'describing' acts as a link.

Can you help me to learn more?