The rating system hasn’t changed, it’s because you’ve been inactive so your rating is no longer considered accurate and like when you first joined, your rating can swing more wildly as it tries to resettle you to your proper rating. After some games played you’ll begin to win and lose less points each game.
For chess, it’s the same thing as always- practice, solve puzzles, review opening lines, review your games for mistakes and implement a good system for evaluating each position. It may take time to get yourself back into chess thinking. 
-Jordan
Is there a way to get back on track? I played a couple of games and i've been kind of destroyed and i miss being 1200, and why did they change it so you no longer get/lose 8 points and now it's like 20?