Concentrate on improving your chess understanding rather than just winning games.
Why am i playing suddenly so badly

Broo I got the same problem!!!!
I got an average around 1850 and I’m keep going lose games…
Now even the 1600 rating beat me 🤦🏽♂️🤦🏽♂️🤦🏽♂️
iI think it’s about stress btw
The same happened to me btw. After I hit 1970, I tilted till 1750s. Basically after a player hits peak, they normally tilt. After a player tilts, they peak. So its the "Chess Cycle".
Yup that's how it works for me