If the change is too big it's a red flag; Carlsen might drop to 2500 but not 1900 if he's trying to win every game.

You mean https://lichess.org/@/BehaardTheBonobo ?

It's a solid win but I think "MAGNUS CARLSEN game" may be an exaggeration; once your opponent blundered a piece it was easy peasy.

I agree that sandbaggers are annoying, you can report them.

Lichess is better than chess.com but I do like chess.com's multiple premove feature.

I understand to some degree I'm being a jerk BUT my opponent could have ended the game at any time.

lichess.org/VhJA1Xos I thought there was no limit on number of moves in chess? I'm obviously not playing seriously here but it's not drawn by 50 move rule or threefold repetition but it's somehow a dr…

You've been flagged for using an engine, you can probably only play unrated if at all.

One of the few things I like better about chess.com is the multiple premoves which I think would make a big difference in super fast games.