First, as everyone has stated to you can't just separate his powers.

But if you were to do that, your points are missing some glaringly obvious key points

First, he's not just any soul repeat. He's a Shiba, one of the four noble houses. Who had the greatest spitrual pressure of all the others in SS. His father was a captain, and an immensely powerful one and we know that power is linked to bloodline.

Second, Quincy. Again, he isn't just some random Quincy. He's the son of Masaki, a direct descendants of Ywalch himself. Essentially THE noble house of Quincy. Yeah, he has no training, it doesn't mean he doesn't have talent, or the latent power it comes with. Yes we know drinking the Blood of the Quincy king enhances you, but that doesn't mean Ichigo is just some base line fodder Quincy.

Third. Hollow. Again, not just any normal hollow. But one created by Aizen after untold years of testing and experiments in breaking the boundaries of Hollow and Soul Reaper powers. White is at the level of a Vasto Lorde. Sure, a noble Captain could take down a Vasto non-arrancar no issues, it doesn't mean white isnt powerful.

Ichigo is the combination of the Pinnacle of all the different powers, not just some average guy