> If you like how a country does things, why not change the country you originate from instead of going to that other country?

Because it's neigh impossible for an individual to meaningfully change parts of the culture they dislike which are ingrained for hundreds of years.

How am I supposed to change one of the major issues plaguing my home country: corruption? It's ingrained at all levels, from politicians to the police, and people participate in it because it's simply the way it is. By rejecting corruption I just made my life harder at all levels, it took me months longer to fix tax issues because I didn't want to pay someone who knew someone and could have it fixed in a matter of days; registering my car at the time took a whole week of visiting different offices, paying government fees in-person at banks so I could get receipts officially stamped, ordering a plate was a 2-day endeavour, I could have paid a person who would have fixed everything in a day but that involves being part of corruption so I rejected it.

I cannot change that, it's part of the culture, it annoyed me to no end, and my individual actions didn't matter at all while making my life harder.

It was much better for my life to emigrate, and live at a place where society is fundamentally more aligned to my values and ways of living.