With reference to a commonly bad behaviour (e.g. corruption), may I write/say: "it seems to be everything but an Italian bad habit only!"?
Based on your comment, I believe your point is that corruption is a bad habit that applies to many countries or societies. Although stereotypes may associate it with Italians, it is definitely not only Italian.
I think for "everything but" you likely meant "anything but".
Corruption is a wide-spread bad habit; it is anything but exclusively Italian.