If you can get around the blatant CGI, the animation nosediving the further along we go, and the outright unnecessary death toll of "beloved characters" by the end... Ragna Crimson has a fairly enjoyable story in theory. From the very get go, everything is stacked against Ragna and the humans in general. It has such a strong start in introducing you to the world and the state that it's in-- namely dragon hunting being such a main staple for how much havoc they wreak against humanity.
Ragna has suffered the dragons plenty throughout his life, despite being weak he survives. He counts on Leonica more times than not. Until the moment he can't. Suddenly there are superior dragons in the picture and they're on a whole other level. Catastrophic world ending kind of level. And suddenly Ragna realizes this is in fact a loop world. And that his future self had entrusted with him everything to right his future wrongs, with power that took lifetimes to achieve.
This is when Ragna leaves everything he knows behind and instead partners up with Crimson who was his partner in crime in the future. They both know the true enemy at hand and are prepared to take them down once they're strong enough.
...Except you'll soon find out that Ragna goes against reason constantly. He could be on death's door and still stubbornly do the dumbest actions you could possibly conceive with given circumstances. All bones broken? So broken every orifice of your body is bleeding? Nah, he just keeps on going! And Crimson has to have pulled their hair out at least a thousand times for everything that's gone wrong because clearly his future self knew better.
Won't go into too much more detail regarding later parts, but just know that the whole second cour stagnates to an unbelievably slow snail's pace. For an action-focused anime, you'd really think they'd put more love and care into the fighting. And they do to some extent. One can only guess the budget was low but they did what they could. Just like any other shounen though, they fight at the same location for multiple episodes. Long and dragged out. There are star moments where they truly shine when it matters, but those moments are few and far between.
It's not an amazing story, but it's not a terrible one either. Ragna and Crimson are easily the most interesting characters, considering their future selves and the way their personalities bounce off one another. Crimson especially is just... this wild character of so many schemes and mischief that constantly gets ruined by Ragna's idiocy and protagonist syndrome of fighting literally anything that smells like a dragon. You might find yourself enjoying the enemy's stories more than you enjoy the 'good side', because they get equal screen time if not more sometimes. If you can make it through the first couple of episodes, you may as well buckle in for the ride.
