I cannot delete an application from my Mac

I have tried using an uninstall app but it keeps saying

"The operation can’t be completed because you don’t have permission to access some of the items"

and when I look under "more info" it says that my "admin" does NOT have read and write privileges, only my "system" has read and write privileges.

Its Bitdefender free 30 day trial version that comes with a VPN and couple other programs.

It does NOT come with an uninstall program.

I am running a MacBook Pro with Monterey.

How do I get this application deleted completely from my Mac... help me.