Weird resolution question

Ok so I will buy something off the market place right, And the screen shots on the marketplace look amazing, I load it into my engine and it looks mehh. I have a gtx 780 ti as a gpu

I also have a 4k monitor and I have it set to epic for visuals or whatever. SO why does things not look good in my engine the way they do in the screen shots.

Post pictures. Make sure resolution scale is set to 100% and everything is set to epic.

I have done that, that is whats weird bro. but in game it looks weird. I am gonna post some screens in a moment to show u what I mean just trying to figure out which thing I bought to use.