Did you know the two counties that have the largest economy today (USA and China) were colonized also? But you are right at one side that African countries were not capable to even repel the colonial invasion, which can be a guess reason though. But what about Ethiopia and Liberia that were not colonized? They both yet also still lacking behind today.
 
  Exactly let’s not apportion blames to our colonial masters Africans love making silly excuses for everything, trying to play politics with everything other great nations that are doing extremely good today were also colonized yet they rise above colony and being just slaves to their master forever. But most African countries still pay homage to their colonial masters till today, for example Nigeria 🇳🇬  Britain 🇬🇧 still decides for the government of Nigeria they still work hand in hand with the same British government that enslaved its people, the Nigerian president even go there for relaxation and medical care pathetic 💔.