Zdzisław is a very fine and distinguished name with many notable Poles bearing it.
No, you don`t know Polish reality at all.
It was, probably decades ago. Now it sounds funny, especially in dimunitive form: Zdzichu. Reminds of characters from jokes about country boys.. My wife`s aunt or another relative, about 80 now, is called Zdzisława and whenever I hear they talk about Zdzicha, I smile.
Błee, you are disgusting.