What are you even talking about, you didn't understand anything even after 500 episodes of the show.

Naruto was not a demon but just a child that did nothing wrong so why is it normal for other people to treat him like garbage ? Danzo was never in charge of the village and in Minato Hokage era he had absolutly nothing to say - he couldn't touch previous jinchuriki Kushina so how did Danzo plan to make Naruto Konoha weapon when he was completly irrelevant and Naruto becoming a jinchuriki was an emergency not some Konoha genius plan.

As for Hiruzen there are valid points that he failed as Hokage on multiple fronts:

1) Could explain everything to Naruto and Sasuke which potentially would solve a lot of future problems. They were not clueless kids but a part of shinobi world even as Genins

2) Didn't remove Danzo once and for all even tho he knew that Danzo is literally a cancer in this village for decades

3) Didn't kill Orochimaru when he could cuz of his weakness towards his student which led to his death and huge Konoha destruction + Sasuke betrayal etc *erfly effect.

4) Didn't solve Uchiha problem and he left that job mostly to Danzo - we know how that ended...

5) He didn't give Naruto anything, safe to assume that Minato / Kushina had a house that Naruto just got after their death. He was actually the one that completly ignored Naruto and his potential to be the Village future savior like Minato wanted. Absolutly no strategic vision completly useless leader. He should care for Naruto like Raikage did for Bee.

Outside of Minato nobody in Konoha could do anything vs Kurama. If not for him literally entire village would be destroyed. To solve the crisis he sealed "demon" inside his innocent child - Naruto. Uzumaki sealing jutsu was the strongest in the entire world so Minato didn't leave a bomb. He saved the Village, Naruto becoming a sacrifce for a demon also saved a village what should happen instead of entire village treating him like alien should be:

1) Explanation from Hiruzen what really happened

2) All those useless clowns from Konoha saying thank you everyday for being alive thanks to Minato to Naruto

2) Training under someone like Jirayia from a little kid how to control 9tails power

3) Under training he would open the key to control Kurama as a kid and would meet Minato and Kushina that would explain everything to him 10 years earlier

4) By all of above he would be strong enaugh as a kid to literally protect the Village from all mess that happened like Orochimaru and prepare for Masked Man world ending future plan.