The point of the article isn't "Malawi is poor compared to Europe," but rather comparing Malawi to other countries that were similarly colonized and how other colonized countries have done a lot better than Malawi - despite often having more adversity in their post-colonial existence.
Yes, being exploited will leave you in a bad state, but it's also important to learn why other similarly colonized countries have done a lot better over the past 30 years - what are the conditions and policies that improve things