https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
If you ever feel an opponent is using disallowed resources, you should report them.
https://support.chess.com/article/209-how-do-i-report-someone
The site closed over 25,000 accounts last month for Fair Play violations.
https://www.chess.com/article/view/chesscom-update-august-2022

That all said, discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums.
If you would like to discuss, join the following club: https://www.chess.com/club/cheating-forum
I started playing daily to get better, and try and increase my rating. I found many of my opponents are playing way better than me, to often, making moves I never thought to, I check their stats…..
And…
One examplez a guy loses one game on rapid, won like 8 and has a rating of 350ish for rapid, but apparently he is a god of chess for daily games.
The problem for me is it cost me rating and time! I am playing these games, and and I guess I could possibly learn how the engine would play, but if I wanted to play the engine, I would simply play vs the computer!
I really dont think you guys are doing enough about this. Cant you guys code the site to flag new players and others who are playing engine moves and have a huge rating fluctuation between bullet, rapid, blitz, and daily? Then you can go through and deal with those accounts