1. Open your game directory, example: C:\SteamLibrary\steamapps\common\Ghost of Tsushima DIRECTOR'S CUT
(Alternative: On your game menu, go to Manage>Browse local files.)

2. Go to: movies>cutscene

3. Find the file called splash_pc.webm and rename it or delete it.

That's it, your game will load directly to the main menu.