Your point about Chicago's front office is one I haven't seen brought up as part of this discussion. The front office track record isn't great. It feels like nothing has improved for almost a decade, if not longer. Some of the cultural issues within the team stems from their decisions (or lack of decisions) has to fall at their feet.
With respect to your question about Angel throwing the team under the bus? My answer is yes and no. Yes - regarding what she said publicly about her team mates. That could have been framed better and she has access to media training supports to help with her messaging No - with how players in the league view the team Sky based on the WNBA player polls that are done every year, it wouldn't surprise me that team morale internally being low.
I'm not of the belief that WNBA teams would not be interested in Reese if she was available via trade. It's too soon to write her off considering this is her second season. This is the only known example of Reese being a problem in the locker room that we are aware of, in my opinion. If there was a history, say similar to Liz Cambage when she was in the league, then it may be a different situation.