I am 800 elo but I defeated 2000 elo?How

[Event "GMAkashGorai vs. AntonioSPN"] [Site "Chess.com"] [Date "2024-09-27"] [White "GMAkashGorai"] [Black "AntonioSPN"] [Result "1-0"] [WhiteElo "812"] [BlackElo "2004"] [TimeControl "600"] [Termination "GMAkashGorai won by resignation"] 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bc5 6. Be3 d5 7. e5 Ne4 8. Nxc6 Nxc3 9. Nxd8 Nxd1 10. Bxc5 Nxb2 11. Ba3 Nc4 12. Bb4 Kxd8 13. Bxc4 dxc4 14. Rd1+ Bd7 15. f4 b5 16. f5 Kc8 17. e6 fxe6 18. fxe6 Re8 19. O-O Bc6 20. e7 Kb7 21. Rd2 Kb6 22. Rdf2 a5 23. Ba3 b4 24. Bb2 c3 25. Bc1 Rxe7 26. Rf7 Rxf7 27. Rxf7 Bd5 28. Rxg7 h5 29. Rg6+ Kc5 30. Rg5 h4 31. a3 Rh8 32. axb4+ axb4 33. Be3+ Kc4 34. h3 b3 35. cxb3+ Kxb3 36. Rxd5 c2 37. Rc5 Ra8 38. Rxc7 Ra1+ 39. Kf2 Kb2 40. Ke2 c1=Q 41. Bxc1+ Rxc1 42. Rxc1 Kxc1 43. Kf3 Kd2 44. Kg4 Ke3 45. Kxh4 Kf2 46. g4 Kf3 47. Kh5 Kf4 48. g5 Kf5 49. Kh6 1-0

https://drive.google.com/file/d/1J8T6lmCpXhq510W21mjP5-wbQvUczJdm/view?usp=drivesdk

Could be anything. People play drunk sometimes.

Maybe you were actually playing the account holder's mongoloid kid.