Thank you for everything you have done, letting me know that I am not fighting alone.
Please ask Microsoft to lay off ineffective engineers and recruit more outstanding engineers to fix this FPS issue. I clearly noticed that the decrease in FPS has been ongoing since the update from 1.35 to 1.36, resulting in a significant decrease in FPS for custom games.
But some people have noticed this issue since 1.33.
FPS Drop Since 1.33 - General Discussion - Warcraft III: Reforged Forums (blizzard.com)