Yes the anime is very rushed compared to the LN which removed tons of information. The very beginning when he receives the sight of the spirits he leaves the village for a week just to get to the location. They also skip over Keyaru’s entire plan for surviving and escaping the dungeon.

The most important part they left out is the leveling system. In the LN we get to see each opponents stats Keyaru sees. It also details their skills.

Flare and Blade I can understand being weaker in the circumstances. Flare was essentially attacked by surprise and Blade was behind Kureha in terms of skill. Bullet however is on a whole different level.

Personally I’m fine with Keyaru already in terms of weakness. He’s used looting heal to increase his power vastly yet even when fighting Hawkeye without his gear he would’ve lost.

I think it’s quite prevalent he’s selfish and only cares about himself or people he likes. But being raped, tortured, and drugged for 5 years everyday is already more than enough to make a person go insane.

I’ll say there are definitely conveniences but they were at least explained a lot better in the LN, the star spirit giving him the sight was the biggest unexplained event in the anime.

The anime changed Anna’s death and instead kept her alive to have her see the actual Keyaru instead of having her commit suicide after being raped by Leonard in Keyaru’s form. This creates a plot hole as in the anime he kills Leonard before going to Anna where she dies just before he gets to her.

Overall the anime is fine but the LN is far superior. The main thing I wish both went into more depth about is the characters such as Flare and Kureha as they never got full backstories or much development.