I am from Thailand and I do not have citizenship or residency in any other country. I need to do an MBA in an international environment, plus work internationally after the MBA. Which is the best / most ideal country for easily getting a visa?

Canada seems very open. I would also look at Singapore and Australia.

https://find-mba.com/articles/post-mba-the-work-visa-rundown

Yes, Canada for sure. Some countries in Europe, depending on what languages you speak. Australia / New Zealand.

Thank you both for your input! I am actually looking at doing an MBA in Germany, because of the low cost and visa policies. Even though I do not speak German it might not be a problem because there are MBAs in English. I think that at least in respect to visa policies, this would be a better idea than going to the UK, right?

I am also thinking about Singapore too.

I don't see what work you can do in Germany without a very high level of German language skills.

Duncan actually has a great post on this matter:

https://find-mba.com/board/europe/do-you-need-to-speak-the-local-language-29546