Hmmm... strangely despite I understanding why most here say this was an unsatisfying end for him... I don't share the opinion, or at least not entirely(?).
I think there are two reasons... first... backstabbing in this story has been something frequent, some times our "heroes" can turn the tables, and others they get screwed, I presume it would have helped if it had more foreshadowing... but I think that defeats a little the purpose of this happening(?), there is a lot I could write but I am not finding the best words, so I will leave this behind.
The second... is that this is the end of the series... but it actually isn't.
For whatever reason Kishiro-sensei decided to end "Mars Chronicles", but the story of Gunnm is still going and there will be another part, so I think this unsatisfying feeling is by design, this is like if he ended a "volume" of a book series and in the next one he will continue the story, but there will be a time jump or he will refocus the story in new directions, but he couldn't do that if he stayed at the same "book", so to speak.
Anyway, personally... I am just happy that there will be a continuation, Kishiro-sensei is an old timer, with the amount of authors we lost in the last few years... I am just happy he is healthy and still writing.
I learned to take the good with the bad, but I had fun with this series, it had a few lows for me but it always felt like discovering something.