You know how i know you're gay you like coldplay
Coldplay are a band that are adored by eighty million people and simultaneously despised by many music critics and serious fans. That's a pretty impressive feat for a group that has been around for 20 years. They have been through a lot musically, too. Their first three albums were pretty similar and then they grew into their own with Viva La Vida, which is still considered one of the greatest pop albums of all time. Then they kind of lost it with Mylo Xyloto, although they have managed to regain some credibility with Ghost Stories.
But if you can overlook their occasional flaws, Coldplay have produced some fantastic songs. They are masters of emotional ballads that sound almost too melodramatic and personal to be true, which is what makes them work so well. They mine what others perceive as cliches and make them feel real and universal. They have a sort of magic about them that is difficult to describe but easy to feel.
Of course, the same thing can be said for many other bands that a certain portion of the population seems to love unironically. It's an interesting cultural phenomenon that goes on in fashion (pork belly is so last year) food ("kale is over") film ("Wes Anderson is too mainstream now") and other areas of entertainment. It's a form of mocking that is often reserved for those who are most susceptible to it, including homosexual people.