Yeh, I could have worded that better but that was the point I was trying to convey.
Chess.com rating estimates are way way off

It is your performance rating, I just said "estimate of your performance rating", because its not exact

What I mean is, if you scroll down the game review highlights at the bottom chess.com gives an estimate of what rating you played like, it could be 600 or 2600
Ok, that's not an estimate of your rating. That's your performance in the game. Your overall rating is based on your play. Your performance is based on not only your moves but also your opponents. If they played poorly it will show you have a higher performance rating. But that doesn't mean that is your overall rating.
The problem is all the 950 blitz players who in reality are 1600 to 1700 elo rapid players in disguise.
Or anything 100- about 3800 if you're a GM