Cheating in daily chess
You can't.
And what is worse, you are not allowed to make such accusations in the forum.
If you want to learn about the efforts that chess.com makes to fight cheating, read this: https://www.chess.com/article/view/chess-com-fair-play-and-cheat-detection
And if you want to discuss it, join the Cheating forum.(It's a club.)
if they were cheating they would not have 1600 rating.
A different thing is that you are weak and a sore loser.
Chess.com takes cheating very seriously:
https://www.chess.com/article/view/chess-com-fair-play-and-cheat-detection
https://support.chess.com/customer/en/portal/articles/1444879-fair-play-on-chess-com-what-you-need-to-know
Discussions of cheating, potential cheating or cheat detection are not allowed on the general forums. If you would like to have that discussion, join the following group.