Who was effected by the Triangular Trade?

Everyone was affected by the trade. Some earn a profit, some earn goods. Slaves are affected the most because they were sold as property

I would definitely say that slaves were the most affected by the Triangular Trade. They were shipped from Africa to the Indies and Caribean to pick cotton and harvest sugarcane and indigo which was brought to factories to be made into cloth, etc. Their work was backbreaking and very laborious.