that one time against that frog boss early in the series, the whole fight was pretty good, until the author decided to take a route he totally didnt need to and the frog didnt die with that poison but protagonist some how has to depend on his godly luck, just that specific part about him putting it all on a random chance just pisses me off to no extent, the author didnt need to do that either, it could just have been the frog dies from poison, or even that frog has 1 hp left and then the protagonist rushes him to kill that 1 hp left, that much is FINE
And that part about him killing that wolf (?) whatever boss in front of all those people and that 7th ranker of heavenly ranks ? dont even mention it, something totally unnecessary.
It'll be fine if you just read to the point where they exit from the dungeon / go to the last floor of the dungeon. Convince yourself that they return home. End of story.