My newest camera is great at daylight but as soon as the Sun goes down I get this image - Bottom Left?
I have tried B/W, Colour Day and Night, Auto and RESET
If it has an adjustable lens, then zoom-in to only see the gate - exclude the problem areas (bush & wall).
If it can't be adjusted, replace it.
If you can't replace it, test some tweaks; trim/tie-back the foliage.