Take the guitar and one of your amps back to the dealer and have him listen while you play your 5420 and another one through the same amp at the same settings. If The other one sounds as clear and jangly as what other folks are experiencing, exchange. If they both sound muddy to you, it's not the guitar for you. Get a refund. Buy a Tele.
I may try this. Unfortunately the dealer is a 2.5 hr drive for me... lol. And I have a Tele Love it. But Not my go-to ax.