Opinion on the ending of Murder Drones (even though it ended months ago) XP

I must say that I was really disappointed with the ending because it almost makes no sense how Cyn was defeated so easily and how pathetic she was when she had N's core that she was about to eat out of nowhere it slips away because of Khan who magically appeared there ;_; Cyn literally destroyed the earth being defeated by drones? how stupid her nerfed would have ended in a quite tragic ending another thing that I don't understand is how V survived... I mean she was cornered by the sentinels which for them was total hell and how they still left us with doubts with other topics and how they totally despised J this in my opinion she had interesting things to give us in the series but she was like a filler character-