Was Grover Cleveland a bad president?

Ranking presidents is not an easy task and, without a doubt, not an exact science! There are many factors to consider. For example, what did they accomplish during their time in office, or what policies did they put forward that impacted the future of the United States? Historians and political scientists have the benefit of hindsight when they rank presidents. And it is crucial to keep in mind that the ranking of presidents is not necessarily based on quantifiable data, but rather presidents tend to be ranked against other presidents—sort of a historical popularity contest! Was Grover Cleveland a bad president? Let's take a look at where some of the experts in the field of presidential ranking place Cleveland in comparison to other presidents.
A C-Span poll of historians (2017) ranks Cleveland twenty-third of the forty presidents who have served. Ninety-one historians participated in the survey and ranked the presidents on administrative skills while in office. Cleveland is unique in that he served two non-consecutive terms, and evaluating the historical context between the terms influences Cleveland’s ranking. A Sienna Research Poll of presidential scholars (2018) has Cleveland in twentieth place. There is no detail as to exactly what a presidential scholar may be, but I added a link so that you can see the criteria used by Sienna. The American Political Science Society (2018) ranks Cleveland in the middle of the pack, while the United States Presidential Ranking (2016), based on a summary of polls, has him at number seventeen. Seventeen is considered "above average" in the United States Presidential Ranking Poll. A survey of other presidential ranking polls places Cleveland consistently in the middle of the pack, and it is fair to say that Grover Cleveland was at best an average president in comparison to his peers. Historians and political scientists use similar criteria, and although it is less than quantifiable, it is difficult to argue with their consistent ranking.
Was Grover Cleveland a bad president? By comparison to other presidents, he was probably not the worst and certainly not the best. Cleveland was an average president. The Miller Center has a generally favorable opinion of Cleveland, writing that he restored confidence and power to the executive branch. Cleveland's accomplishments include civil service reform, and his assertion of executive privilege set a precedent for future presidents in dealing with the investigative powers of the Congress.
"Bad" is too strong of a word. Capable, competent, and average may be a more accurate representation of the two-term president Grover Cleveland.
https://millercenter.org/president/cleveland

https://spectator.org/the-weakness-of-academic-presidential-greatness-rankings/