So I tried WeMod with Resident Evil 4 Remake, Mortal Kombat 1 and other games. Everytime I play any game with wemod, it causes really low fps in every game. I dont really get why the app has to look so fancy, while it makes the software highly resource consuming and therefore causes bad performance in more HW-demanding games.
What are your PC specs?
I don’t have any of these issues when using WeMod. The app uses hardly any resources. Open up task manager and have a look for yourself while the app is running.
Welcome to the community. 
Like the person above, I am also not experiencing the same issue that you’re reporting, on either of the games currently installed on my PC.
One thing to consider doing is making sure your Windows OS is up to date.
And make sure your GPU is up to date by visiting the manufacturer’s website (don’t rely on Windows’ built in “check for updates” tool in device manager, it’s useless and misses critical updates, you’ll need to check manually to be sure there isn’t an update Windows missed or completely ignored).