My biggest complaint was Leto winning over Fassbender.
Have you seen "Dallas Buyers Club"? If you haven't you should see it before complaining about Jared Leto's Academy Award winning performance. I love Michael Fassbender and loved his role in "12 Years A Slave", but Leto's performance in "Dallas Buyers Club" was far superior in so many ways.
Then again, I'm a big fan of Fassbender, but I found him to be very believable as the slave driver. He disappears into what should be, and is, a reprehensible character, but brings some much needed vulnerability and spark to him. This keeps him from being a caricature, and keeps the film focused on the story at hand. Leto's performance is pretty damn great too.