Line of Sight Blockers

[Kakerate]

Hi, I'm trying to use Line of Sight blockers to create bushes that block line of sight, but the doodad 'Line of Sight Blocker' actually doesn't work, units inside a wall of them are visible as if the doodad does nothing. I'm not expecting help fixing the brain aneurysm caused by Blizzards disgustingly bad coders, but could anyone provide some kind of library that handles line of sight blocking via code?
proof:

 

[Kakerate]

bump

 

[Pwnica]

Bruhh its 2020 do all yourself bro
here i did a fun map for you with bushes