ntfs is the Windows file system, which can cause problems on linux. I recommend downloading the game again to an ext4 partition, which is compatible with both windows and linux. For me, practically all games work with proton experimental.

Step-by-step guide:

• Back up the ntfs partition
• Convert the ntfs partition into ext4 (you can use GParted)
• Download Bottles
• Follow this simple tutorial: https://youtu.be/gme5RSvq8Nc
• enjoy