While Ichigo does indeed have some Quincy abilities, the whole process turns out to be actually triggered by Kirge and his jail. The explanation of how breaking out of the seal also released his inner memories from deep inside his soul was ridiculous, and the whole chapter reads a lot like a supermarket tabloid article. Ichigo himself is completely clueless about what’s going on, so Juha gives him the whole “I know your secrets but I’m not going to tell you” attitude, teasing him with hints about his mother and more. I think some people actually speculated that Ichigo’s mother may have been a Quincy, and as crazy as it sounds, that might actually turn out to be true. Their intentional vagueness obviously pisses off Ichigo to no end, even more than he was already, but at this point he’s still pretty helpless against them.
There’s no surprise he’s getting his ass kicked, since the power difference between Ichigo and the main villain is always very large initially. The Vandenreich see him as a potential asset (as they did with Aizen) and seem to be aiming to capture and brainwash him. Luckily for him that probably won’t happen, as the Vandenreich are forced to retreat thanks to a little trolling from Aizen. Incredibly, Juha’s lieutenant Haschwald actually breaks Ichigo’s bankai before they leave, leaving him with a lot of catching up to do before he’s in any shape to face them again. The most scandalous detail is left at the very end as a cliffhanger of course, though I’m not sure how to interpret it exactly. I am truly left at a loss for words; if we take it at face value, this would be a plot twist that reaches levels of insanity we haven’t seen since Aizen revealed that everything was an illusion. Ichigo, your whole life was a lie.