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It is certain that a country's success is built up by several factors [2]
Some people believe that economicquality is a ruler which measures a country's development.
... it's not the quality, .... it is the status of economy or economic development/ progress
ome people believe that economic quality is a ruler which measures a country's development. However, the opposite opinions argue other elements play more essential roles in the success of a nation.
... this prompt is different from other agree/ disagree essay topic. There is not such argument mentioned in your prompt. It says ;
Economic progress is often used to measure a country's success. However, some people believe that other factors are more important.
As per prompt, there is a statement that economic progress is used for measuring a country's success and some people have a concern of having some other factors also in that equation that is used for this measuring. It does not talk about two sets of people having opposite views. So you should align your introduction accordingly with what your prompt suggests.
Also, please include a more meaningful topic in the subject field and open this type of essays in Writing Feedback forum.