I consider it rude. Here I am licking my wounds, maybe cursing myself for playing so badly, and then here's the popup interrupting those thoughts, essentially saying, "Ha ha, let me beat you again."
Request Rematch After Winning

bro just says How did you defend that and come out ahead?! Can I get a rematch? that's so sus and like and subscribe pls!!!!!!!!!


I once lost a fairly close game and got a rematch request.
I accepted it, and in the ensuing game I proceeded to absolutely smoke the dude.
Strangely, he didn't ask for another rematch. 😂
It would be trivial for Chess.com to add a Setting like so:
Accept rematch requests:
(o) Always
(o) Only after I win
(o) Only after I lose
(o) Never
------------
And I've suggested it. But they're more interested in adding bells and whistles. The lack of this option is the main reason I won't pay for Premium.
To offer a rematch is giving the opponent the opportunity to play a new game and this is, strictly speaking, the prerogative of the winner. It is implicit that the loser would want to play again.