I have been to denver more than 50 times in my life. About 80% of the time when I fly somewhere, I connect through denver. There are flaws to the airport for sure. Some the United airlines ground crew there was on strike, 17R/34L is closed due to construction, it is always overly crowded in concourse B and almost completely empty in concourse in a and c, most of the time it takes a very long time to taxi to your runway, it is actually famous for that, and it is very far from downtown.
But denver is probably my most favorite airport out of any airport I have been to, aside from my home airport. The most common plane there is the a320. That is my most favorite plane for reasons I cannot explain. The views of landscape and more importantly, the other planes from the plane are just breathtaking and just give you goose bumps. And most importantly DEN is the hub to my most favorite airline, United. It is so unique from most other airports you see. All the runways are perpendicular, runway 16R/34L can support any aircraft in the world even with the high altitude. You can have your opinion, I just probably see it much differently than you do.