To provide a counterpoint, I've had my MacbookPro for over 3 years now and still have the same power cable and adapter as when I bought it. I never wrap it, toss it around in my bag with all my other junk, carry it in all weather, and I use it every day. My connection works fine and my brick hasn't overheated.
Not to say you're not having those issues, just that there are good experiences and bad experiences with every product.