15 years abroad...now going home?

Ive been living and working in south korea for 15+ years. I got married here. Had 2 kids here. Built a decent little business here. Got divorced. And have been raising my kids here so they can be near ex and his family.

Life is comfortable here. But i dont have friends. I dont have a partner. Just my work and kids.

I am american. Ive made the decision to move me and my kids home. My mother is 85. My kids have never met my family. I dont love my hometown. I dont really want to move back to it but that is the only option for now.

I dont have a good relationship with my ex. I try to be civil but thats a struggle much of the time as well. Hes a "good father"...he does what he thinks hes supossed to but his actions are empty. The kids are now starting to see/feel this but they still have love for him. They have love for his family.

The divorce was 5 years ago. I have given them 5 additional years of a relationship with the kids. In the meantime my kids lack a relationship with my family. My dad has died in that time and now my mom is all that is left.

I am scared to move back to america. Being a single mom in america sounds terrifying. But life here is stagnaint. I want more. I want to be able to have meaningful relationships. Something that will just never happen here. I can never fully intergrate here. Relationships here always just stay on the surface.

I guess im here to ask, am i making the right decision moving home? I know as a mother my kids have the right to family, but what about my family? And dont i have the right to something? Im questioning everything.

As a note: when i was married the plan was to move to america eventually. But that was destroyed. He has since married and divorced another american and is now engaged to a 3rd american woman. He obviously wants that greencard. But he and his stb 5th wife (i was stupidly 3rd wife) are trying to force me to move to her state instead of my hometown (again...i dont love the place but my people are there) he still currently lives here in Sk with his family.

Note 2. I can legally take the kids home. I wont be kidnapping them. But as is life...they will eventually lose their familial relationships with their uncle/grandparents/cousins.

I dont know what im asking. Maybe just screaming into the reddit void. Im scared and i feel the weight of the world on me.

I will be starting from what feels like zero yet again in life. I have a savings for the move...not a lot but enough. The ex does not pay his childsupport. Ive been fincially responsible for the kids for most of their life excpt his family does buy them clothes/shoes. But that will be coming to a slowdown now as there is a brand new grandbaby (the first boy grandchild...which in asian culture is a big deal)

Note 3. The kids have been asked multiple times what they want and they have been explained to multiple times what this move means for them. I think my oldest (9) gets it and the youngest (7) kinda gets it. They everytime say they want to go.