The quarter pounder is loaded with sugar too unfortunately. The sweet bread is one of the worst things about it. The salad dressing will be too. It's not healthy and doesn't even taste good. But it's addictive.
Then again Buffett apparently did it for 6 decades. But he also only had to drive a few minutes to work and probably had a mostly stress free life. You can eat all the healthy veg you want but if your day is punctuated by a dreadful commute and generally filled with stress, that's what will get you.
The sugar in the McBurger is nothing like the amount in a coke or a shake.
And no, McBurgers are not addictive. I don't want more than one or two a month.