You have to learn the language, which is hard, and takes time. You have to learn and embrace the culture, which is even harder. I have seen so many people failing at the first step, and sadly never really integrating in their adoptive country...

i havnt lived in teh UK for maybe 20 years but can confirm the grass is sometimes greener lol

what people underestimate is how you start back at baby level, can't speak properly, don't know how to do anything, don't have any contacts or support network etc. shit takes time to build and forces extreme growth, or failure. defo not for everyone