I would argue that those examples aren’t pointless. Just showing fight scene after fight scene without anything in between is pointless. Take your first spoiler as an example: that scene highlights his change in personality. The same goes for the second spoiler with added info about how abnormal his abilities are.

Then there is all the deliberating and thoughts he had in the secret dungeon. In the anime he enters, there is a montage, he fights some boss and he leaves all in the span of just a few minutes.