wtf is going on

i had great teams for a while now everything was fine even if i lost at least my team knew what to do an made some form of come back an if i lost well it was because of a mistake an we lost an i wasnt mad about it then last night i decided to get on an play a game or two i won one i thin kan after that every team i got just absolutely got slaughtered no come back at all like 8 to 45 kinda games what the hell happened? i can NOT win a game now i know i make mistakes an im not calling my self better then other people but i feel like in bronze 5 an im silver ;|