Need help with deleting Paper/Bukkit 1.16.5

Ever since I've installed it, it takes much longer for me to load the server and often times when I connect to the server, nothing is rendered so I have to keep reconnecting to it until it works properly. I've tried deleting it on my own by deleting paper and bukkit.yml files but they come back once I start the server. Any help is appreciated.

Quote from Roman

You just have to install Vanilla again on the software page

Thanks a lot!