The intentional abuses of colonization were vile, but the neglectful exploitation of decolonization has hardly been better.
I think we just at a different development stage. The impact of corruption in Africa is more acute. The West have been building hospitals and schools for centuries. We were late to the party. Corruption means we don't have essentials, hospitals, running water, schools. People end up dying of diseases that have cures because there is no medicine.
In most non-Western countries, this level of trust or belief/existence of the judicial system is absent. Which increases the risk exponentially of investing, working etc.
Now of course, you do need a good education system to provide lawyers/judges and people of every skill level to man these institutions and keep them from corruption. So it does seem like a somewhat cyclical problem.
I am by no means condoning what the West is/has done. I however have a problem with my own people taking the lions share of any profits.