Hashirama was super strong- failed to kill of Madara properly.
Tobirama was wise- failed to satisfy Uchihas properly.
Hiruzen learned from the two above - failed to handle Danzo, let a 13 year old boy shoulder the responsibility of saving Konoha at personal cost, failed to handle the threat Kumo posed and let Hiashi take the fall, Let Oro escape ( he was the one who destroyed Konoha first.) - in short compromised in every tough situation he ever faced.
Minato- died too early.
Tsunade came at a time when Konoha was running out of Hokage candidates and suffering from a double destruction(kurama's and the Oro's attack) and loss of two hokages within a period of 12 years and a major clan Uchiha.
She saved Kakshi and Sasuke and gave Naruto a chance going against Danzou. Lee who had lost any chance as a shinobi was able to persue the career once again because of her. She handled the village which was running short on shinobies. She extended the support to Sand and managed to get them as a closer allies.
Running a country which has constantly running into one problem after another and major wars is not a small feat. She was the reason Sasuke was not already being hunted as missing nin. If she was not open minded and efficient the elders and Danzou would have made her a puppet long time ago and Naruto would have been sent in confinement.
You can hate all you want. Konoha was lucky to have her.