There's so many people from countries other than those in the UK who just plain didn't understand what the opening ceremony was about. Mostly Americans if I'm honest, people who thrive on congregating and circle jerking about their mutual confusion instead of doing some research. Maybe the lesser minded people would have enjoyed fireworks and explosions a bit more
For me and many others, the opening ceremony was amazing, and a perfect representation of British culture. Danny Boyle did an epic job.