Most of your complaints seem to be about Chinese international students.
Similar problems exist with (as a class) Indian students. The difference is that I went to school in Vancouver, so most of the experience that I have in an academic context is with Chinese individuals. There were still Indian students, and there was still cheating, but there were just fewer of them.
Despite your low opinion of them, students from Indian universities have no problem getting admission to Ivy league graduate schools or landing jobs in Silicon Valley.
That depends on the student, the school, and the experience. Populations are populations, and individuals are individuals. There are some very good schools in India, and they are very competitive. They aren't the problem.
Unfortunately, Canada has decided to treat all programs, from all schools, from all countries as equal for immigration purposes. A masters from a diploma mill in India is equal (for immigration) to a masters from an Ivy. That creates a lot of incentives for gaming the system.
Google and Microsoft don't seem to mind having an Indian-educated person as their CEO, but hey these are just two of the biggest tech companies in the world and Silicon Valley is only the world's most innovative region.
Nor do I have a problem hiring good Indian engineers. That's more likely if they were educated in a Canadian or US school, but it's certainly not a requirement. I'll hire people who have no degree at all.
What I won't do, however, is trust someone has the skills simply because they have an Indian degree. I'm going to vet them, and I'm going to vet them more than I would someone making it through Harvard. Having been there myself, I know that if you can survive that, you can do the work.
As for Satya Nadella, he got his MS at the University of Milwaukee, and his MBA from the University of Chicago. At that point, the quality of his education in India wasn't particularly relevant to Microsoft.
Pichai Sundararajan, of Google, has a MS from Stanford University, and a MBA from UPenn, so again, the Indian education system is less relevant.
Furthermore, ones work experience with a company is often more important than credentials, and tech is one of the few fields where experts can be entirely self-taught, making credentialing significantly less important to begin with.
Why should we trust them when we have highly credible Reddit experts like you to rely on instead?
Why shouldn't we trust them, and the fact that the Indians they chose both had significant education outside India before the companies trusted them enough to make them CEOs?
Better still, why not trust the CEOs? Why did they come to the US to finish their education, rather than simply getting the education they needed in India, where it was likely cheaper? Why wasn't an Indian education good enough for them?