Too many players playing those time controls in the under 2000 bracket, especially close to 1000 elo, so elo is meaningless. I've said it a million times, the elo bracket on this site is absolutely broken in terms of actual playing strength, and the lower you go the worse it becomes.
Im playing against under 900 elo players who play at 40 centipawn loss or lower. Some even in their 20s. And they are not even 1000 elo rated on this site. Makes absolutely no sense.
It’s not about the opponents, just your own blitz skill issue 🐸