I mostly play on lichess where I’m ~2200 rapid ~2150 blitz. I’m also 1797 USCF, but that rating is from a few years ago.
On a whim I decided to play a couple dozen games on chess.com where I was either destroying or getting schooled by 800s, to the point where 26 games in I’m rated 840 with 16 wins and 10 losses. Looking at my lichess history I’m 46-2-3 against sub-1400s, so I feel like I should handle lowbies pretty well.
Are the ratings on that site just random numbers?