-he actually lost to hiruzen who was 60+ years old because he lost his arms and failed to destroy konoha
1.) Hiruzen was known as the "God of Shinobi". It's understandable to lose to Hiruzen, not many can actually beat him.
-he lost to 4 tailed cloak naruto
2.) He didn't lose to 4 tailed cloak Naruto, he was playing with Naruto and his emotions and then left for other matters.
3.) He was on his deathbed and had to wait till the jutsu was ready to take over a new body. Anyone can kill him when he can't fight back.
-he got one shotted by itachi TWICE
4.) Itachi was just plain badass, nuff said.
-he was stuck inside his own curse seal until helped him get out of it
5.) He wasn't stuck inside his own curse seal, he made curse seals incase he ever died, he can be resurrected.
-he didnt get to be 4th hokage
6.) He didn't become 4th Hokage because he was doing forbidden experiments that Hiruzen found out about.
7.) He didn't lose to Tsunade, he left the battlefield because again, he had more important matters he wanted to attend to.
-he failed to take over sasukes body
8.) He failed to take over because the jutsu wasn't ready yet. The reason Sasuke attacked at that time was because of the weakness in moment. If the jutsu was ready, Sasuke would be gone right now.
-he didnt master edo tensai
9.) According to what he said when he returned, Kabuto was merely borrowing his power. That means his power is far beyond what Kabuto was displaying. Kabuto only gathered a ton of DNA samples to make an army which Oro never bothered with.
-anko said minato can beat oro, oro's own student is against him
10.) Where did Anko say that? Please show. Also, Minato is a battle genius. Even Hiruzen feared the fact of ever facing Minato head on.
-he didnt have a strong enough body to get dragon sage mode (if i remember correctly)
11.) His body wasn't the issue. He was still searching for the holy land to study the arts to become a Dragon Sage. Kabuto merely took the findings Oro already had and managed to find the land with that information.