Severe reliability issue of Apple iCloud: Randomly dissapeared files from iCloud folders

Many of the files from my iCloud just randomly disappeared, and empty directories and subdirectories remained. It is impossible I have randomly or accidentally deleted files in so many different directories and their subdirectories. I pay for the iCould storage and I'm far below the limit. I have called the Apple support and they directed me to make Data Recovery through icloud.com but this works only for the deleted files, not for the files that just disappeared from unknown reason. The Apple support could not provide any solution to the problem and they didn't give me any explanation why this happened and if it will happen again. Even I suggested to give them the names of some of the files that disappeared (I can find them in the list of recently opened files), but they couldn't do anything.

Despite paying for Apple iCloud service, the inexplicable loss of crucial files highlights a severe reliability issue, leaving users deeply frustrated and disappointed. I will never use iCloud again.