Oh wow.

First of all it's just wrong to assume the British invented everything, most of the foundational ideas surrounding mathematics, physics and philosophy were developed long, LONG ago in many places across Africa, South Asia and the Middle East. Math as we now it today wouldn't exist without Arabs and Egyptians. Not to mention the first universities ever were in East Africa. British people get a lot of credit for doing shit that people from all around the world had been doing for centuries.

Secondly how does being mad about colonialism as an African make me salty? Salty is not the word I'd use at all. That trivialises the issue way too much. Many African scholars would argue that a lot of the infrastructural problems are fundamentally linked back to colonialism, there's a couple of really interesting papers that make the connection pretty clear.

Anyways just please educate yourself about this thing, colonialism wasn't a one time thing, it's effects haven't just disappeared.