I actually really dislike DLSS and FSR. At least to me the upscaling is pretty noticeable (but not the end of the world), but the artifacts that it causes drive me insane. I haven't tested Onion Ring with it. But for example FH5 I get all sorts of ghost images on my screen and they go away as soon as I turn off DLSS.
Also weirdly on my laptop I got worse performance. I'm assuming that's because I'm 100% CPU limited and there is a bit of CPU overhead to running DLSS.