Run for loop for multiple folders

I have been working with multiple folders, each folder have distinct name and each of them have multiple CSV files inside, i have a bash script that for each csv file inside the folder, makes a folder with the name of the file and makes N copies of the files inside the new folder, in the original bash script, i can write the specifically folder were it runs.

But now, i have a hundred of folders, and i try to automatize this script but it don't works appropriately

#cd grupo_2_pareja_D-H
#cd grupo_2_single_D-H
#cd grupo_2_tercia_CDH
for d in ./*; do
    echo "$d"
    for x in ./* .csv; do
        mkdir "${x%.*}" 
        for ((i=1;i<=10;i++)); do # Create a loop, looping N times
        cp "$x" "${x%.*}/"${x%.*}"_$i.csv" # use i in the copy command
        #rm -f "$x" # Remove the file after the N copies
        done
    done  
done

I looking for some help to make this posible, thanks in advance. Regards