It did work fine, it’s just you’re a hopeless contrarian. Warcraft 3 Reforged Patch 2.0.0 does not work on Windows 7 - #213 by Tenrai-2832 —has 3300 views, meaning all of those views come from people who were playing on win7 PCs and now after war3R 2.0 were unable to play.
I have friends from W3C who played warcraft reforged with classic graphics on win7 and some decade old computers. W3C deprecated Win7 alienating hundreds of players. I protested there as well. Offered to help continue development for win7 launcher. Alas
As for FPS I have personally tested win7 machine with Radeon 6770m and integrated 3000 HD WArcraft 3 reforged 2.0 was very much playable with an average of 45-50 FPS … So ?