MIAMI GARDENS, Fla. — The Carolina Panthers showed the world exactly the team they hoped they could be on Sunday. It was gorgeous. It was stunning. It was … brief. Once the second quarter started, the game turned into what everyone thought it would be in the first place, and Miami ended up whipping Carolina, 42-21. But Carolina led 14-0 after an extraordinary first quarter, moving the ball at will and stifling the NFL’s No. 1 offense. By halftime, though, Miami led 21-14 and it got worse after that, as the Panthers (0-6) stumbled to another loss and showed once again why they remain the NFL’…