

This is a result of a SCOTUS decision. SCOTUS membership is determined by the president and control of the senate at the time of vacancies. Neither of those are influenced by gerrymandering.
At the core of it this comes down to 2016 when a larger than typical number of people on the left lied to themselves and said “eh, they’re all teh same” and tossed their vote at a third party or just didn’t vote at all. Following that, SCOTUS went from a 4-4 tie (with 1 vacancy) to 6-3 conservative advantange.
I wouldn’t blame laziness, but instead a combination of apathy and people who are more interested in ideological purity than in accepting the available-better such that they would rather complain about the unavailable-best.
RBG refusing to retire in 2012-2014 also shares blame. She could have retired then and the court would be 5-4 instead.
The basic outline of where to split the company seems straightforward to me.
AWS get split off first and foremost, that part is blatantly clear to me.
From there, the retail webstore (what we generally think of as “Amazon”) gets split off from its broad category of services: music and movie streaming and everything in that category.
After that, split anything that involves designing/repurposing other designs and selling a specific consumer product off. Kindle, Alexa, Roomba (if that purchase goes through), Amazon Basics, etc.
I think there’s a decent amount of room to get more granular with the process, but I think that covers it as a basic outline.