I have same issue turning all settings of DLSS and RTX on with any graphic setting combination gets me the same frame rate but much higher frame time with DLSS enabled.70 percent GPU usage with DLSS with same performance (lowered temps I guess). I achieve same frame rate 55-64 with Ultra setting,s Rtx on, Dlss off and 0 extra at 2560 x 1440 with 97 percent GPU usage and 10ms avg frametime looks way better as well.

There is no point to DLSS if I can achieve same FPS with better visuals and frametime without it.
Its not utilizing my GPU like properly implemented DLSS 2.0 should like Death Stranding does.
On my wife's PC uninstalling KB4579311 October windows update netted her 15 fps gain and fixed her File explorer problem that was DX11 though. Do not know if its related or relevant.

8700k at 5.2 GHZ
3080 at 10502 Mhz mem and 2115 Mhz core 450 watt bios
64 GB 3200mhz ram
970 evo plus drive