Responses

Facts! Do you know why Keiki felt that Riku was his mate right away? Was it strictly physical attraction and greed or something else? I mean once he felt Riku was his mate, he didn't hesitate one second and literally arranged everything to make him accept him. Must have been something special but it's hard to find that moment in the first chapters
As a reader I can truly say that Keiki is one of the ideal Alpha with a little misguided communication that I ever read.
Keiki was not immature on the situation he is in. He did not take advantage or was arrogant (He was stating facts when talking to Riku's Parents about there company's circumstances). He went to Riku's parents as an Alpha wanting his Omega and asked for permission, he included the company because he knows that it was his last card. He did not do anything that would make Riku feel like he is less, it was more like a literary sense of being responsible in the situation that he put Riku into which was take care of him in place of his parents and as his fated mate (I think Riku just misunderstood Keiki's care as a form of him being weak, since he was raised as an Alpha).
Once Keiki figured out why Riku's attitude was not like Normal Omegas he adjusted and bowed his ehad to make sure Riku has support.
We all know that Omega's don't want to be a slave of their bodies and that what makes it so hard for them to live a life where they can be free. But let us not forget those Alphas (Good Alphas) who have the same circumstances as the Omegas where they can't control their instinct even if they try so hard (That instinct where every fiber of their being controls them). We can at least acknowledge the fact that the setting is animalistic so in one way or another and those good Alpha's even with good intentions will make mistakes and be controlled by that animalistic characteristics (Like what Keiki being possessive towards Riku and he bit Riku).
My point is. Keiki is not a bad Alpha