Nearly all of those are at the very least solid 7/10s. Only Crash is a piece of shit, and King's Speech is meh.
There lies the issue. The Oscars while opinions, are supposed to be for the very best films. 6-7 out of 10 is normally an alright film.
Going through the list
Best pic winners since 2000
Gladiator - This is the very definition of a 7/10 film. Well shot, acted, etc. I personally love the film and it's call back to the old historical films. But he did the same thing, just 5x better 4 years later with KoH. In the end, Gladiator was just that. It's a great memorable film, but it lacks that certain vision I feel to elevate it.
A Beautiful Mind - I love Ron Howard, but no. No...Fuck no. This was trash. Apollo 13, sure. It's what he does best. The movie at best is a meh, at worst a painful experience. It
Chicago - Again, this is that sort of wank fest Hollywood loves to give themselves. I liked the visuals and some of the numbers, but it's not even close to a good, let alone great film.
RoTK - Nope again. FOTR is the only one of the trilogy deserving and rightfully should have won. This was a massively bloated mess of a film that was a pure apology for ignoring FOTR.
Million Dollar Baby - I can't even remember a damn thing from this.
Crash - I was laughing at the end.
Departed - Mess of a film again and another Academy, "We're sorry" to Scorese.
No Country for Old Men - First truly deserving film of the decade.
Slumdog Millionaire - I'll actually be in the minority, but I think it was deserved. It's basically a great blend of a fairy tale story mixed with the upbringing story of the slums, over three generations. With the 1st gen child actors being really good.
Hurt Locker - I understand why it won. It's the film for Iraq basically. But one, she did it better with Zero Dark Thirty. Two, it's got some excellent tension, but fizzled out by the end.
King's Speech - Another Gladiator, pure 7/10 and it's well done, well acted, everything. But again, it's a visionless film I feel.
Artist - Who?
Argo - Really?
12 Years - Oh hell yeah, only downfall was Brad Pitt shoehorning himself in, but Steve McQueen directed the shit out of this.
Birdman - No opinion.
Spotlight - At first, I was against it, but really the film has grown on me. It's an extremely well done. One done with as much subtle as the actual story and it worked. It took a second rewatch for me to appreciate it.
So I'd say they are at 4 out of 15
Denzel is your classic leading man movie star that can elevate decent to ok material solely by his performances that can carry it. Very few actors can do that.
Denzel is a Star, not an Actor. You go to see Denzel... be Denzel. There is no other way to say it.