One of the major problems the EU is facing is the divide between the better off countries and the countries that are less well off. And it comes down to how to pay for stuff.
A wealthy EU means every member is better off but the cost of creating this wealth has always been the responsibility of certain countries. So I can understand why the governments of Netherlands and Germany (and a few more) are sceptical of creating this EURO Bonds while at the same time not really tackling the underlying policy problems that italy and Greece for really bothered fixing.
The problems of Italy are not fully to blame on Corona, Italy has been systematically mismanaged for decades and this pandemic has been the straw that broke the camels back.