Suddenly became very bad at this game

Hey, so as the tittle says it...

I was placed in Silver 2 after 10 promo games. Then in just a couple of days I went from S2 to G2 and then I got suspension of my account for 2 weeks. And those two weeks I basically played Battlefield and sometimes on smurf acc just tryharding in normals against really low players. Unranked, Bronze and Silvers. After ban expired I went playing instantly and I don't know what the fu*k is actually happening, I can't win a single game. I just went 0-5 (0W-5L) and dropped to G3. What the hell, like I don't recall being THIS bad at the game 14-15-16 days ago.