I think because of lack of cooperation and hatred among black people, it was easy to enslave them.
Even today Indians and Chinese cooperate to achieve great things but black people continue fighting each other.
African countries are in shambles.

Indians had weapons to confront attackers. Black had only sticks and stones to confront people who had guns.

Blacks were strong and we're able to withstand adverse conditions

The simple answer is our leaders. because of our leaders we were exploited.they cause disunity among us for their own selfish benefit.And also a curse placed on the black race by noah on ham our ancestor,saying we shall be slave to the white.

The blacks were the strongest

Fitted for adaptation and heavy work

They were divided too

Their strenght and weakness were played against them

Africa was made up uncountable small empires and city states that mostly were in dispute with each other...

We weren't united... Or resisted as one.

It made it easier for the Europeans