For me, what immediately alerted me was the rotation, position and size of the billboard. It should face the road, not the the camera. It should be smaller considering how close to the road it is. And it is way too low above the road. I don’t think you would even be allowed to have a billboard over a public road at all, let alone so low.

After that, I looked closer and don’t really see how it is supported. Looks like it is floating. Maybe the one pole on the left could be connected although it does not look that way. Even if it was connected, the billboard would have too much leverage being only supported on one side.

Zoom in and look at the persons below the billboard. Below the statement, read the text on the billboard that shows what brand the billboard it is.

There are other issues too if you look closely. The reflection in the building windows of a non-existent car, the strange merging of two separate buildings in top left corner, the malformed black car on the right side of the image, the street that merges into a building, the malformed traffic light on the left, the black car with human persons protruding through the bonnet like video game characters clipping into other objects, etc.

Edit: added some other examples