I had similar pattern when I had an AMD card, but it wasn't as bad as that. Unfortunately I was never able to get it fixed. Now I have a GTX 1650, and the transparency in the trees etc is completely smooth with it.I've been having this problem with csp for the longest time were im always having this weird AA effect with the trees, fences etc.
Ive tried different aa option like smaa and even and even tho i use amd but nothing changes. its there in vanilla as well but to a lesser extent.
View attachment 1003345
This was taken when I had the AMD card, just zoom in and take a look at the trees: