I literally don't understand, did everyone start cheating or have a sudden jump in skill? I used to consistently maintain a 1400-1500 rating and now I am getting stomped by 1200s, something has changed and it is not me. I am playing the same chess I always played.
Everyone at some point or another will start to lose their marbles. It's the name of the game. Nobody can maintain it forever.
Everyone has good and bad days in chess. Factors like fatigue, distraction or emotional state can affect your gameplay and lead to unexpected results.