Why were the Articles of Confederation not successful?

After the colonists won their independence from Great Britain, they didn’t want to create a federal government that had too much power. As a result, the federal government was a fairly weak institution.
The federal government could not do many things. For example, the federal government could not levy taxes. Thus, it was difficult for the federal government to pay its debts. Since there was no central bank, too much money was printed, causing inflation to occur. Besides the federal government, each state also was able to print money.
The federal government couldn’t make people join the military. As a result, the federal government struggled to deal with aggressive actions that other countries took toward the United States. The Spanish and British interfered with American trade. The British wouldn’t leave forts in the western lands that belonged to the United States. The American military was not in a position to deal with these actions by other countries.
The federal government also had trouble dealing with uprisings within the country. When Shays' Rebellion occurred, it was the state militia of Massachusetts that ended the rebellion, not the American army.
There also was no court system. As a result, there was no place that states could go to resolve disputes that they had with each other.
http://ushistoryscene.com/article/articles-of-confederation/

https://www.history.com/topics/early-us/shays-rebellion

https://www.thoughtco.com/why-articles-of-confederation-failed-104674