It sounds like you are having trouble deleting files on your Mac because of an issue with the .Trash folder. Here are a few things you can try to resolve this issue:
1 - Check the permissions on your Trash folder: Open the Terminal app on your Mac and type the following command:
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ls -leO /.Trash/
This will show you the permissions on the .Trash folder. Make sure that you have read and write permissions on the folder. If you don't, you can change the permissions using the chmod command:
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chmod u+rw /.Trash/
2 - Check for hidden files in the Trash folder: It's possible that there are hidden files in the .Trash folder that are preventing you from emptying the trash. To check for hidden files, open the Terminal app and type the following command:
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ls -a /.Trash/
This will show you a list of all the files in the .Trash folder, including hidden files. If you see any hidden files that you don't recognize or don't need, you can delete them using the rm command:
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rm /.Trash/.hidden-file
3 - Repair the disk using Disk Utility: If none of the above steps helped, it's possible that there is a problem with the file system on your Mac. To repair the disk, open Disk Utility (located in the Utilities folder), select your hard drive, and click the "Repair Disk" button.
I hope these steps help resolve the issue with your .Trash folder. If you continue to have problems, you may want to try using a third-party utility such as CleanMyMac to clean up your hard drive and delete any stuck files.