Hello maestracloyd,
We see you have issues with viewing the Trash mailbox on your Mac, and we'd be happy to help.
This page here has a lot of helpful info regarding deleting emails on your Mac: Delete emails in Mail on Mac
This one can help with adjusting 'Mailbox Behaviors' to ensure that your mailbox for Trash is set appropriately: Change Mailbox Behaviors preferences in Mail on Mac
If you're having issues with the app being unresponsive when trying to change preferences, there are some suggestions here: If an app freezes or quits unexpectedly on Mac
You can also try loading the Mac up in safe mode, for issues with not being able to adjust settings: Start up your Mac in safe mode
Take care.