Hi,
Thank you for posting in Microsoft Community.
Based on your description, it seems your unable to completely disable the Word Count feature on your Word completely. Let's work on this issue together.
To better understand the situation, I would like to ask some questions, such as:
Generally, to turn off word count in Microsoft Word, you can right-click the status bar and deselect Word Count from the pop-up menu. And I researched a lot on my side, however, I didn't find a related registry edit to disable it in Word permanently.

If you are still encountering the problem, you can try installing the Office updates Install Office updates - Microsoft Support.
If an Microsoft 365 application such as Word or Excel isn’t working correctly, sometimes restarting it will fix the problem. If that doesn’t work, you can try repairing it. When you’re done, you might need to restart your computer.You can also perform Repair an Office application - Microsoft Support
I hope this helps. Looking forwad for your response!
Sincerely,
Leonardo_Y