Returning player (sort of)

I recently started playing again, I still play overwatch as my main game but i play league casually here and there but i still want to play ranked however I'm placed in platinum and my skill level is much worse than platinum after my break. I constantly get harassed for being shit or people say they will report me for intentionally feeding. I usually remain silent in game to avoid any chat bans but now I'm wondering. if i keep doing poorly in ranked and get reported is there a system to show that i'm truly not feeding but i'm just rusty/bad at the game ?