No. Driving in Europe is not mostly a pain. Driving in Europe if you're American is mostly a pain.
In Britain, we take our cars to Europe in order to drive around it for fun, because some of the twisties are better, the weather's better, and we're more-or-less obsessed with cars as a nation[0]. That, and it's where the Nurburgring and the speed-limit-free Autobahns are.
As for the lack of fatties...
You might want to consider that your "small" Coke at the drive-through is congruent with our "large", and we don't even have the ridiculous buckets'o'pop that you do. In Wendy's in Philly, I saw that you could get a 32oz Sprite. That's two pints of pop, and about a zillion grammes of sugar.
Remember what I said about eating in America? A "small" of anything is large enough for my European appetite.
New York was populated by people I would adjudge to be more-or-less normal-sized. Philly, by contrast, had some of the fattest people I've ever seen in my life. I felt positively svelte.