Daikenja Riddle no Jikan Gyakkou

Story
The core premise—traveling back in time after a thousand years of grinding to save the world—isn't exactly new or fresh. We've seen this "do-over" concept plenty of times before. I was still somewhat curious to see how they would handle it, but honestly, the story doesn't even matter. It is completely impossible to get invested in the plot when the execution of the show itself is this broken.

Visuals
I genuinely do not understand how the author or anyone in charge approved this production. Calling it an "anime" is a massive stretch; it is quite literally a PowerPoint presentation with voice acting dubbed over it. There is ... almost zero actual animation. It honestly feels like the production budget for an entire episode was less than the cost of a fast-food combo meal. It’s incredibly lazy and completely ruins the viewing experience.

Conclusion
Is it worth watching? Absolutely not. If you are genuinely interested in the premise, you might as well just go read the manga—though from what I can tell, the source material is pretty mediocre to begin with. This is a very hard skip. Don't waste your time.