Feel like quitting chess after this game.

He is friend with GM absolutely he is pro no need to worry one of my friend 1500 elo and he is get from 800 elo to 1500 by just

Help of a book booby Fischer teachs chess u c try that book

And sorry for bad english

Learn how to open . . . Don't move any pieces twice in the first 6 moves . . . Castle within six moves . . .

This book should help you . . .

It's only $10.00 or free at a LIBRARY . . .

Also go to this link . . .

https://www.chess.com/forum/view/for-beginners/beginner-to-intermediate-5-dubious-traps-you-need-to-know?page=1#last_comment

I am not sure how this guy could play so well at this rating while down in material and still be up in time.
same problem here just 1 answer Chess.com doesnt want to hear out loud in their forums (their anti cheat systems fail horribly)
people have an engine on the side on their telephone or tablet some other device they dont need time to think online games with the invention of AI
reporting doesnt do much either too many games for chess.com to evaluate with the # people they have so recreational players that dont cheat gg (your almost forced to do the same to have a chance to win)
(is getting outplayed by whoever cheats the best)
yes it may sound like kramnik just facts

Stop blaming your losses on imaginary cheaters.

Sorry OP, but you weren't being careful enough when converting. Look out for potential pins and forks, review the game, and keep playing. You'll get better, but it takes more than a few days or weeks to do it.