There's lots of threads like this. They all go something like:
"Person X says Beats are the best. I told him they're not, and he said I'm wrong. He's wrong! Beats are teh suxx0rz!"
You're never going to convince somebody who doesn't know anything that popular consensus is wrong. It's a despairing prospect, but people with almost no knowledge nevertheless often make (sometimes very passionate) choices concerning things like whom they vote for, which clothes they buy, and, yes, which headphones are the best. If people A through Y say "Teh Beats is teh roxx0rz!!111!!1", person Z, no matter how right they are, isn't likely to counterbalance the weight of people A through Y.
It's a known fact that many people don't consider the quality of an argument, only how many times they've heard it. Many times = correct to most people, despite the obvious (and often exploited) opportunity for manipulation. The understanding that this is the case is one of the fundamental building blocks of successful advertising. And until you have a multibillion dollar budget and decide to spend it on spreading the message that "Beats r teh suxx0rz!!!1111!!!!," you're not going to convince the average non-enthusiast, charts, graphs, or video reviews notwithstanding.
So it's time to stop trying, people. When your friends come to you and ask for advice, that probably means they trust you, so give it. When they don't, don't. And in the name of all goodness stop trying to convince people you barely know of your point! It does nothing but make you look bigheaded!