Ethiopia wasn't colonized until 1935 either. Until that point it was a backward & barely governed feudal state where slavery was still legal. Modernization had taken place fitfully, but was limited by the power of the local Rases (princes). Colonization actually provided a circuit breaker of sorts & left behind a much more modern nation in every way. That doesn't mean that Ethiopia was any better governed than any other African nations. Indeed, it was worse than many until the early 1990s.
Colonization was such a vast & complex thing that simple 'good v bad' formulations are near impossible.