Deleting WordPress while leaving the other data alone?

First take a look at this FAQ: https://wordpress.org/documentation/article/faq-my-site-was-hacked/

To delete WordPress, you must delete all files belonging to your installation. You can do this via FTP. There you should find the root directory of your installation in which the directories wp-content, wp-includes and wp-admin exist. You should delete these and all files in the directory. This should also include the .htaccess file. Make sure that you do not delete any files that you may have uploaded to the directory yourself via FTP.

As soon as you have set up your project again, take a look at this article: https://developer.wordpress.org/advanced-administration/security/hardening/

The articles are intentionally kept as general as possible and therefore also very technical as WordPress allows a variety of possible setups. If you are having trouble with some of the steps, seek support. The community is large, there are many people out there who know their way around WordPress. It might be a good idea to contact your hoster’s support team first. If they can’t help, you may be able to find someone here who can support you personally: https://jobs.wordpress.net/