With me, I wasn't so much comparing as I was learning. But it seemed I was comparing, which looked like I was complaining...and that was no where near it.
You see, for me it was more like I was talking out loud. "Okay, here they drive on the left and in the US they drive on the right". And then to myself I'd do a mental listing-making, "Okay, got it, must remember for next time."
I didn't understand just how much it appeared I was kncocking everything here until people around me reacted more and more as though I was insulting them. So, instead of making the comparisons with them, I brought my comments here and it helped talking them over with people who knew exactly what I was talking about.
I suppose some of this learning was a frustration..."Why don't you do it like this? It makes so much more sense!" But, after a while, in settling into the routine, not only did I learn the little things, but I also understood that Brits don't do things a certain way because sometimes the American ways don't make sense for the culture and surrounds.
After a while it sunk in. Also too, things became routine and the learning curve wasn't so sharp any more. Now it's not so much a country difference than a personal difference. "This is the way I like to do things." And for that stuff, being in England is great because I feel here you can make a difference. See, my own personal life goal is to live a life that my epitaph would read "The world was a better place because she was in it." And I like to think I've added to our little town.