Uninstall Discord?

I have had my laptop new since yesterday and installed discord today which worked well at the beginning now I have closed it once and now I can no longer open and uninstall it

Look here, couldn't explain it better:

To completely uninstall it, I recommend Revo Uninstaller: https://www.revouninstaller.com/de/revo-uninstaller-free-download/ The freeware version is sufficient. It can also be used to uninstall if there are problems. All residues are also removed.

Then reinstall Discord cleanly. Then it should run normally again.

Reinstall. Use an uninstaller or delete everything under AppData Local and Roaming.