Also, we cannot blame him for something Hive account@ned did or didn't do. How does this make sense? Did we even know for sure that Justin knew about Ned's agreement?

First, they signed a Non-Disclosure-Agreement, so they'll both never tell.

Second,

Crypto Briefing reached out to Ned Scott about the move by Tron. Surprisingly, the former CEO seemed supportive of the action by Justin Sun, saying that “witnesses/portion of the community literally stole its [Steemit Inc’s] coins [which is demonstrably false, nobody "stole coins", they only hobbled Sun's "voting-power"]. Steemit owed them nothing.” He continued, “Steemit owes no one anything and anything else is grasping at straws / bullying to get your way/power… Fact: no pre mine, no investors.”

The Steem community was outraged by Scott’s comments, saying that over Steem’s four-year history that the founder had promised [apparently a non-binding verbal agreement] that these coins would be used to “decentralize” and wouldn’t be used in voting.

https://cryptobriefing.com/tron-executes-hostile-takeover-steem-exchanges-collude/