These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
One major problem is the Loads and Loads of Characters means few of them get significant screentime, which combined with Haggis' desire to make a movie about racism, makes it seem like racial issues are literally the only thing any of these people ever talk about.
Award Snub: A snub in Crash's favor - a lot of people think it won Best Picture more because it was the least controversial of the year's Best Picture contenders (with the exception of Good Night, and Good Luck.) than for the film's actual quality, and it's seen by many film critics as one of the Academy's biggest mistakes over the years.
Harsher in Hindsight: In 2013, with an increasing acceptance of homosexuality and more attention to racial tensions in the media, it's likely that if Brokeback Mountain and Crash were released now that the latter would be seen as more controversial.
Hilarious in Hindsight: Assuming you buy into the idea that the film won Best Picture over Brokeback Mountain because the voters wanted to go with the less controversial message movie, it became quite ironic when writer/director Paul Haggis left Scientology a few years later over their support of Proposition 8.
Hype Backlash: It got a lot of this after it won Best Picture, especially since the film had come out long before the main awards season and many people had forgotten about it until the Oscars.