Overall: End was not justifaized
555 is like good literally up until Delta is introduced. Delta is so irrelevant I put all the pictures in this post and was like yep this is all the important characters and I'd completely forgot about Delta. Then the end is an absolute mess where nothing makes sense and I have no idea who wants to kill and who wants to save the orphenoch king.
However, 555 is really good in the sense that it's not tripping over that issue Kamen Rider loves to make a mess of. This is one of the monster is a minority stories which sometimes (555, Amazons) Rider can handle well. Other times we get Ex-Aid, and I've been told Drive has really bad issues with this. Kabuto made a complete mess. The shows track record is abysmal. However, 555 does a very good job in how it handles a lot of it. We have our main orphenoch who don't want to be "bad orphenoch" but are constantly put through it by humans and it can start to break them. It's not entirely their own fault because it was humans that couldn't just not be awful and let them live. It also is interesting to have the kind of closeted orphenoch that doesn't really accept himself as one of them and hides it and therefore doesn't face the same kind of issues. He's still dealing with a lot of the judgement directed towards orphenoch but not the "people are offering """electrotherapy""" (read: just electrocute you to death) to cure you of being an orphenoch and make you a normal human".
This is one of those where yeah this sounds like an allegory for something huh.
Of course, this is rider so the orphenoch are commiting murders. We can't tell these stories perfectly.
Watch 555 but not if you can't handle suicide or neck trauma because that's all on screen in this show
List of Series
Lupinranger vs Patoranger