Huge issues on FUT Champions

To start off I would like to say that I have no major issues playing in Division 1 against higher ranked players.

I have perfect Internet connection, no hardware issues whatsoever. Everyday gameplay looks normal, players move freely around the pitch, each has good movement and feels natural.
So, each FUT Champions weekend, after 6-7 games, no matter if they were won or lost, (which I moslty win).

After those games comes the real struggle. Suddenly, players lose all their agility, they won't position themselves according to the tactic, they won't try to get behind the defence, they struggle to move around the pitch, everyone feels clunky and if they lost one leg. 

For comparison - on a normal day, after pushing side lane, I would get 3 people in the penalty area which is my attacker, winger, and my offensive midfielder. On fut champions, for some reason my attacker tries very hard and does everything NOT TO GET INSIDE penalty box. Player struggle to pass, dribble (Zidane lost the ball all by himself during dribbling with R1), or defend. I've played against hackers, and its not like playing while being hacked. It looks like normal, but isn't. 

It also doesn't matter if I play all 15 games in a row, or 5 by 5 games each day. I did play at night, at evening, at morning, none of this matters. 

This state instantly changes after the weekend league. 

Also, I can't pull ANYTHING from packs. I've bought Fifa Points but it didn't change much. Still no pack luck. 3 months with the only good pull a gold Theo.