[4th Dimension]

Have you ever wondered why doesn't Takuya save more often? As it turns out, according to reddit:

Spoiler for mechanical spoilers about the game, nothing story related:

The events of the game are actually on rails most of the time, and only occasionally is there a timeline branch. The game version of the reflector device even blinks ahead of time when a branch is imminent. When the device is not blinking it is impossible to change the course of events; you can make a save, but it will not be very useful (other than returning to pick up an item). Takuya even loses his memories between each jump and will react and behave exactly the same as before. The fight with Houjou is one such branchless sequence that will play out exactly the same no matter what you do: he is defeated but Kanna's psychite is gone.

So yeah, in game there was a physical reason why he coudln't save whenever, the anime just decided to ignore that little fact, thus making him idiotic.

AGGGGGGGHHHH