Extremely slow to count files and folders in vault

Nope, I meant the volume type you have configured in your app settings. Means the type of your virtual drive/filesystem. It’s either WebDAV or Dokany or FUSE. I recommend to use FUSE (WinFSP)
See here: Volume Types — Cryptomator 1.7.0 documentation
(Please ignore the information that FUSE is only for Mac/Linux. It’s outdated. FUSE is available for windows too via WinFSP)