It's no secret that the Anti-Aliasing in Persona 5 Strikers is completely broken or very badly implemented. Whether enabled or disabled the game has way too many jaggies and causes the UI to appear blurry.

I have spent the last few days messing around with various settings within the game and Nvidia Control Panel none of which really made the game look any better in my opinion.

I think I have finally found a way to make the game much sharper by using the in-game resolution scale, which is also broken to a certain extent. I will show you how to fix that.

• Open the game settings and go to Config > Graphics Settings > Disable Bloom, Anti-Alasing, and Radial Blur. These are all useless filters that make the game even more blurry.
  
  
• Now go to the bottom of the Graphics Settings and set the Resolution Scale to something higher than 1.0, the higher the better. I have chosen 2.0 for my game. I have a mid range GPU and still keep a 60FPS lock at all times. (This game is not that difficult to run).
  
  Once you apply the new resolution scale you won't notice a difference as this setting is also somewhat broken and requires a refresh.
  
  
• To refresh and apply the new resolution change go to Config > Display Settings > Change your display setting mode to something other than the current selection, apply it and then change it back.
  
  For example if your game is currently set on Fullscreen, change it to Windowed mode and apply the setting. Now go back and change it to Fullscreen. This causes the game to refresh the display and correctly applies the new Resolution Scale settings.
  
  IF YOU SKIP THE STEP ABOVE YOU MAY NOT NOTICE A DIFFERENCE AS THE RESOLUTION SCALE WILL NOT HAVE APPLIED CORRECTLY.
  

Below I have added a before and after so you can see just how much better the game looks now.

It can be difficult to tell by the images below, however in game there is almost no jaggies and the game is so much better looking.