[DreadBringer]

Likewise for the response in a good number of the parts here. Like to talk long about something to try getting it full.

I mean, the reason for the part of Shinji and Tezuka is because the first post talks about how Shinji convinces anyone and gets ignored as complaint, so I want to point out that Tezuka also received the same treatment. But if this is about Tezuka being given motive explanation then ok (I mean, "true" Kamen Rider depends on morality not how much story etc. though). Well yeah Shinji doesn't have backstory or something, but that's made as him being the Everyman character type (the more normal guy compared to fantasized ones, these types are often working or middle class and deal with everyday problems, may also be placed in extraordinary circumstances): Riders before and after Shinji had something to do with the forces that moved the story onward or had some tragic past that defined them, but Shinji was just a normal guy who accidentally stumbled into the Rider War. Because and despite the fact that he had nothing to lose or gain by entering, he gave his all to stop the fighting. This is also partially justified for Shinji's entire place in the war: A completely normal guy with no wish and no desire to fight somehow managed to find an Advent Deck and become a Kamen Rider. All the other Riders were picked specifically because they would have a reason to fight (and it has benefit on Shinji where he resisted Time Vent). This also extends to his powers where he's a jack in all stats; with balanced deck having two shields, a sword, and a projectile, and also reflected in Ryuki Survive: Drag-Visor Zwei is a gunblade that can be used as a sword or a marker for Meteor Bullet, and Strange Vent can copy cards.

Actually Ren only take his original wish of curing Eri, which is seen when Eri woke up. Seems that the wish is automatically granted when there's only 1 Rider left. Kanzaki is the one that ends the war directly, being the only one who is able to do so (and had done before to restart the war), at the behest of his sister who finally knows the war is meant to save her, by hearing directly from her (as he won't listen to anyone else, albeit Shinji reaffirms this too shortly after) that she doesn't want the new life that comes from countless bodycounts, due to Shinji dragging on the war to the birthday, forcing the secrets and lies (the truth about the war) to uncover, by supernatural means (body fading away). Shinji indirectly makes Kanzaki end the war though he didn't know, but it's still his doing and Ren also got better outcome at the end with the reset which is him and Eri just being safe and can live together.

Villains can do good things just to benefit them, I ought not to commend those acts. That's called pragmatic villainy. Talking about past the point of redemption like him baiting others to kill Akira, this part is a reharsh of that for Asakura, where he seems to save a child, but only to use her as a bait with him not having any real compassion to her (when Venosnaker attacks her), once again showing him as beyond redemption. Other example of pragmatic villainy is Masamune in Ex-Aid who presents himself as an amicable boss to Genm Corp's employers. This will also benefit his employees after they suffer under bosses like Kuroto and Lovelica, getting more comfortable atmosphere, but this is nothing good on Masamune, he just does that to benefit himself. Or in other media, Red Skull who doesn't appreciate anyone on his payroll doing similar sadistic villainy, due to villainy committed on his dime has to have some kind of profit for him, which also had him foiled Madam Hydra's plan.