He failed to protect his Students, his wife, his son, and long term the village
It was not his fault Obito died. They were sent on a mission. War is war.
Rin was already a Jounin when she was killed, Minato was not responsible for her and Kakashi.
His wife willingly sacrificed herself for Naruto and would have died for the village, too. She wanted to seal the Kyuubi inside her and die. Minato chose to let Naruto meet his mother instead, and that lead to Naruto being able to defeat the Kyuubi.
As for Naruto, Minato wanted him to be raised a hero. It's Hiruzen that changed his name and never told the villagers who Naruto was.
He failed to notice the "masked man" even though minato is a skilled sensory type. this leads to the unsealling of the 9 tails and its attack on the village
He was busy keeping the Kyuubi sealed by himself, which is no mere feat.
It's Kakashi's fault for telling graves secrets that allowed Obito to attack them.
It's Hiruzen's fault for not being there and letting ANBUs guard Kushina and we know that ANBUs are the biggest fodders ever.
He was selfish he wanted his son to be have power and to be a legend a burden that ruined most of narutos life.
How Minato Chose to defeat the 9 tails, the reaper death seal. was not the best choice to to use against the 9 tails either.
We have if akatsuki members can defeat Jinchurikis and bijuus. that tells us the Kyubi could have been beaten through a different means.
No. Minato didn't seal Kurama for Naruto to be a badass. He sealed it because he believed in the Toad's prophecy and because he believed that Naruto would be able to contain Kurama. This was later proven true and Naruto is the only thing keeping the Alliance alive.
As for Kurama, you can't kill it. Akatsuki caught the Jins. They didn't kill them.
You can't KILL a tailed beast. You can only seal it. You can kill a Jin, though.
Minato had the shortest and most unsuccessful reign as hokage
Really? Hiruzen's failure to kill Orochimaru resulted in him and a ton of shinobi of Konoha getting killed in Oro's invasion.