I… uh… what?

DLSS does not cause you to lose fps, it causes you to gain them, by reducing image quality.

DLSS 100% would… just be … the same as not using DLSS, as you would not be reducing image quality at all.

You would only lose fps running DLSS if you’re comparing different games, on the same hardware, where one game requires DLSS and the other does not…

…and that first game is very graphically intensive and cannot really be run without DLSS, whereas the other game doesn’t need DLSS…

… or, your hardware simply doesn’t well support DLSS.

Either way, both are apples to oranges comparisons.