I was looking through whoscored rankings to see how players from each league were performing. I looked the number of top 50 players (who had played 2 games or less) each league provided.
Seri a has been awful so far.....

La liga
best player rank: 1
number of top fifty players: 8

germany
best player rank: 3
number of top fifty players: 10

epl
best player rank: 5
number of top 50 players: 6

ecl
best player rank 30
number of top fifty players 1

ligue 1:
best player rank 9
number of top 50 players 6

seri a
best player rank: 14
number of top 50 players 3

turkish super lig
best player rank 16
number of top fifty players:: 2

eredivisie
top player rank 1
number of top fifty players 1

mexican premier league
best player rank 25
number of top fifty players 2

mls
best player rank 26
number of top fifty players 2

belgium
best player rank 45
number of top 50 players:1

Who ranks the players?

they use statistics to rank the players. You win points for making a tackle, key pass, inercept, etc. and lose points for errors