No! Keep your account, and just take it as a slump. You can look through my daily game history. I won a bunch, then I lost a bunch, annoying, right? Then I won a bunch again and gained over 50 points! Just because you lose one game doesn’t mean that you give up and close your account.
Look every chess player has this problem a week ago I reached 1900 and then I went on a losing streak I couldn't belive my self I was so sad and then I took a break for 3 days and now I'm the same pro I knew(but I didn't reach 1900 again because I don't use chess. Com too much