did you ever visit countries like Mauritius, South Africa, India, Malaysia, even Cuba ;-) - anything that has value and keeps the countries function was brought by the colonizers (British, French, Dutch, Germans)
I have visited all those countries actually. Maybe you should study history for example for India. The British de-industrialised India and set it backwards. India made up around 19% of global GDP before the British colonized and deindustralised India for its own gain. They destroyed everything from local textile factories onwards. They only built India's extensive rail network to move goods from inland to ports for export to UK. They only educated the people serve their agenda of control. I can go on for days. Seek the truth always.
Economic Deindustrialisation of India - Wikipedia
"It is true the sun never set on the British Empire, because even God didn't trust them in the dark" - Dr Shashi Tharoor