How do I reset VSCode?

Try deleting default settings file, Its located at:

Windows %APPDATA%\Code\User\settings.json
macOS $HOME/Library/Application Support/Code/User/settings.json
Linux $HOME/.config/Code/User/settings.json

If that does not help, try deleting extensions located at:

Windows %USERPROFILE%\.vscode\extensions
macOS ~/.vscode/extensions
Linux ~/.vscode/extensions