"Skill issue" you say ? Why, that's exactly the problem indeed.
You shouldn't have to require the skill level necessary to survive a bullet hell sequence when you're tying to play what is essentially a Visual Novel.
This is a 180° genre shift and would only work if the minigame was optional, but this is mandatory. Since most people going for this game will expect a difficulty level that's in line with the Danganrompa series, which is not known to require even half as good reflexes for its hardest minigames, a lot of people who are here mostly for the story will fell like this is a big middle finger from the game's design.
A player shouldn't get potentially gatekept from progressing by such a radical genre & difficulty shift after more than 10 hours of content that showed no sign this would happen.
So the problem isn't that a player doesn't have the skill to pass this, the problem is that it shouldn't be even possible for a skill issue to happen in the first place, which is sadly the case in this game.