The actual reason is that the west colonized these countries in the most brutal fashion, murdered millions of people who opposed western imperialism, then put in despotic regimes in place that serve western interests. You're evidently utterly ignorant of how the world actually works. Here's a book you should read that explains the reality of things https://ia800309.us.archive.org/26/items/fp_Killing_Hope-US_Military_and_CIA_Interventions_Since_WWII-William_Blum/Killing_Hope-US_Military_and_CIA_Interventions_Since_WWII-William_Blum.pdf