I rejoined the USCF after a long absence. Played two recent tournaments and my rating plunged from 1456 to 1386, getting beaten by players rated 300-400 points lower than me, something that never used to happen. Joined chess.com and my rating is in the low 800s, and it seems everyone plays well (I've ruled out cheating as they still make mistakes and inaccuracies). Has the game passed me by that badly with the advent of computer studying or did my skills erode that badly? Or maybe both.