Exactly. I mean, everyone wants the best. Even I until recently had lost the perspective of being objective. I was running dual 1440p displays and was having a few scaling issues. The obvious answer was to bump up to 2160p or go back to 1080p. With my 3080, 2160p is doable but needs more reserved settings. However, it's a 1080p beast.
So for the OP, their 3090 will do 1080p like an absolute dream, 1440p exceptionally well and 2160p very well with maybe some setting tuned down a bit. So real question is, as always, what do they want to do that their 3090 isn't doing for them now?