Leaderboard Algorythm in Seasons Mode

Hello everyone,

I haven't been playing seasons for a long time and after leaving the Ultimate Team I've decided to just enjoy the game and play Seasons.

I've started from division 10 and I've won 73 out of 75 games. I've been promoted to the 1st division very quickly I've kept winning. Then of course I've been thinking I might be up in the weekly Leaderboard list at least. Then I was shocked. I'm on a 30 win streak and I'm in 890th or something while another player with 30 wins 1 draw and 4 loses is in top 100, in 60th place. How can there be such difference? What am I doing wrong? or What am I missing? 

I've used Galatasaray as my team in most of my matches and I played as Real Madrid for a couple of matches I guess. Does the team matter? Should I play as Barca or PSG all the time for more points?

I don't understand this system.