How I can win, if my opponent cheat 😔?

Cheaters f**k

Cheat with a better engine obviously?

Well, if your opponent is sneaky enough to cheat in online chess, it's time to unleash your secret weapon: the "Absurd Gambit." Begin by deliberately making the most hilariously outrageous moves possible, like sacrificing your queen for a lowly pawn or arranging your pieces in the shape of a smiley face. Confuse your opponent to the point where their cheating algorithms start questioning their own sanity. Soon enough, they'll be so busy scratching their heads in bewilderment that you'll have the perfect opportunity to swoop in and claim victory, leaving them wondering if their cheat codes malfunctioned in the presence of true chess wizardry. Game, set, match, and a dash of absurdity!

Oh, winning against a cheating opponent in online chess is an absolute breeze! Just hire a team of elite hackers to counter-hack their cheating algorithms, launch a satellite into space to disrupt their internet connection, and of course, don't forget to bribe the online chess platform administrators to banish them forever. Easy peasy! Or, you know, you could just report their cheating, focus on fair play, and let the chess gods handle the rest. Cheaters never prosper, right?

on a serious note, the only hope you have is time

If you suspect someone of cheating, report them.

https://support.chess.com/article/209-how-do-i-report-someone

https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com

https://www.chess.com/article/view/online-chess-cheating

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