Slaveaway,
You really have no idea do you? There are 100's of guys here who are trying to get your job, who have regretted leaving your job.
You haven't even considered all the other things that you give up to come here, you're just focused on the big machine and destinations and I understand that but you're missing the forest for the trees. A cockpit is a cockpit is a cockpit. Whatever the size of the aircraft behind the cockpit door means nothing because it doesn't change your pay. A 777 cockpit might as well be 170 cockpit, its just a place with 2 seats and a some buttons that turn on pumps etc that you share with some dude/chick for "X" hours that you've never met before.
I digress, no one will be able to help you understand how it goes here, you'll have to make your own mistakes in life. If you do decide to go down the expat life then understand that you will always be a mercenary for the rest of your career and that means you can basically kiss jobs like Delta, United, American etc goodbye!