I will start with the game works perfectly on Steam Deck with zero issues, so I can wholeheartedly recommend the game if you plan to play on that platform. The below reflects on playing the game at a desktop computer.

Disgaea 5 is a fantastic game marred by a PC port which is prone to regular freezes on contemporary operating systems and hardware.

With enough googling and playing with the different suggestions people have made online, you might get the game into a baseline workable state where you won't have to worry about your entire PC freezing every time you exit a map back into the main hub, but this work shouldn't be on consumers to figure out or implement.

Killia's my favorite transmasc in the whole series. Love this edgy guy.