HOW TO FIX IT
Open the steam vr settings, go to video options and increase the global resolution to 150%, then go in the application settings tab, select ethan carter and increase the application resolution to 500% .
Now open up the game go in to the settings and make sure you have antialiasing turn off, now the main menu will still look blurry but you will see the difference once you are inside the game.
This will most likely solve the problem without reducing the performance, but if you want the game be even sharper or you are using an high resolution headset like the pimax or mixed reality you can just increase the global resolution to 200% or 300%.