Did Western Culture Ruin Africa?

Now that is a big topic! But, it's been something on my mind since I first came. I somehow had a view of Sub-Saharan Africa as an ideal world, except for huge issues with poverty and exploitation. Yes, there are the enormous problems of poverty and exploitation, but that is not the only thing that harms the people.
Tribalism is a major issue. Certain groups marry the outcasts of others, others are in longstanding feuds -- simply because of the tribe. One example is the conflict with the Masaai and some of their neighbors. In Masaai culture, it is believed that cattle were created for them, and for them only. Therefore, if someone else has a cow, it rightfully belongs to the Masaai so it is "okay" for them to steal it back. This obviously causes problems for the original owners of the cattle who then go to steal the cows back etc. The post-election violence in 2007 was fueled especially by tribal groups who believed their leaders should be in power. Today, the government is mainly controlled by Kikuyus, the largest ethnic group. The country is divided into tribal areas, and the people find it very foreign that I don't have a tribe because the U.S. is so mixed.
Distribution of wealth is another major issue. While in general the majority of the wealth belongs to outsiders, the Kenyans who are very rich for the most part do not help the poor -- there are few in the middle class. The poor believe that the rich have taken what is rightfully theirs and the high school students jokingly aspire to be Robin Hood-like "international thieves."
Speaking of thieves, violent crime is prevalent. While this is most certainly fueled by need, more than one of my students have had a parent killed by robbers, or known someone who has been kidnapped for ransom etc. I used to be worried by the gruesome creative compositions they would write, but have come to learn some of them are their reality. If people catch a thief, the police come to save the thief from being burned alive, rather than just to arrest the person. I definitely don't want to make it sound like everywhere someone is trying to cheat you, but perhaps just to point out that everywhere in the world there are criminals.
So, my current conclusion is that colonialism did do harm to the social and economic systems in place in Kenya, and has also left a major British influence in the judicial and educational system. While some of this is good, for example equal education for boys and girls, the effects of the horrible murders against those who opposed colonization and other events that took place still linger. However, before Africa was "discovered" by the West, there were still problems. In literature courses you learn that people are the same everywhere and it is true --in both their assets and faults. Yet, the joy I see the people find in life is something I've found unique to Africa and am blessed to experience their happiness regardless of external circumstances.