The movie before the movie

Rating: 6/10 (17 May 2015)

Ultron is a robot who wants to destroy humanity. That's established from the moment he appears. Why he wants to destroy humanity? Why does he go to that extreme right away? That's not so clear.
Sure, as a specie we do a lot of bad, stupid and evil things. But that's not all we do.
Side question: why is he a he? I suppose a female main villain, like in Terminator 3, would be too senseless, or whatever.
The Avengers are all cool with each other now, so all the character development is sort of lost. There is no real tension. Their interactions, to me, were kind of boring--forced.
Side issue: I wish there was more diversity--Latino, Asian, Black, Native American. In a sequel, how about adding more diverse faces, along with the main cast. Here come Elizabeth Olsen's Scarlet Witch, Aaron Taylor Johnson's Quicksilver, and then Paul Bettany's The Vision: actors with similar skin tones, like most of the main cast.
This felt to me like a movie before the movie. Loki and The Chitauri were big villains. So from there, you go to Ultron? Thanos is obviously the big bad guy--the world conqueror. However, Marvel didn't want to do that yet, so here's Ultron.
I thought I would be amazed. I wasn't. I was not only disappointed, but kind of bored.