@Kotarou out of pure curiosity, have you read the rest of the thread from before your post? Because, your opinion will be your opinion, and I respect that; but Riki possibly being my favorite protagonist, I would love to try and change your mind.
First, if you want to actually know what the creators intended with this story and these characters, read the VN. Remember that the anime is an adaptation (and not even a very great one), and by definition, it is impossible for an adaptation to express the exact same things as the source material.
Now, you say Riki is weak. But the fact that you have finished the story still holding that opinion makes me feel like you didnt understand or something.
(Im really proud of that post, so you could probably go read it and understand, but I’ll reiterate anyway.)
Weakness is a very human characteristic. We are all weak. We are all in need of saving in some way, but at the same time we all have the capability to save others.
Riki’s story is repeated so much because it is literally his life. It is his existence. Riki could not have survived on his own. That is the point of the World Where Nothing Happened. It didn’t keep repeating because Riki kept screwing up. It kept repeating until all of the regrets had been fulfilled. As Kyousuke’s regret was that he would be leaving Riki and Rin alone, the world wouldnt stop repeating until Riki and Rin were strong enough to survive on their own. Of course Riki would fail sometimes. Its cliche but true: we all make mistakes.
Its not like he was “cheating” or something because Kyousuke was helping him. It was Kyousuke’s goal in the first place. The “true end” is an embodiment of Riki’s strength, not Kyousuke’s.