Objects with flickering and noised edges

In our game which is still in early development we're (we, Unity rookies) facing this flickering issue occurring especially in edges which are very close to each other, but not limited to them. The problem worsens once the camera moves but in the idle

Here is a video depicting the situation. Notice that once I disable the edge detection the problem persists even though it gets less bothering. https://youtu.be/EL28HORkbbU

Here are our Edge Detection settings

Here is our PP antialiasing settings (We also tried FXAA but it comes with worse results)

The buildings are natively modelled with ProBuilder. Unity version: 2018.2.14f1

My question being, is there a way to solve this issue to obtain smoothness in such edge detection cases? Are we missing something? We want to keep that visual style in which edges are drawn in black.