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Koube is very pathetic. He feels so inferior that he made multiple AI girlfriends instead of finding a real one. That's worse that admitting you use a sex doll.
What's even more sad is that he made an AI with an independent, dominating attitude, but feels that his masculinity (if there's any) is threatened, so he abandoned her for a more submissive, obedient Saati. The flaws that Twenty pointed out, Koube denies it and tries to modify the AI's to satisfy him, not changing himself to fit with others.
Koube is the definition of a beta male. I hope that he improves from this because right now, he is one of the worst protagonist I've ever seen.