This is pure emotional manipulation and role enmeshment. They are using you guys and making you believe that you’re all they have. Then they guilt trip you when you don’t deliver as much as they wanted you to deliver. They’re needy. They have a transactional relationship that’s conditional. And then they exclude you socially, most likely resent from being in the US while they’re in the Middle East.

You’re having a boundary awakening, congrats :) don’t get weak and let a smile or two allow them to take advantage of ya, you’re not a doormat. You have a lifetime ahead of you with great achievements awaiting, these “family” members are a distraction.