Honestly, as others have mentioned, I don’t agree its bloated. If anything, its actually missing a few features (like the ability to bulk change many repos with the same issue tags). Also, I like some of the new updates that are being released.
It doesn’t run slowly in ANY way.
Furthermore, Sourceforge used to be the monopoly, and honestly, that was FAR more bloated. Projects will be found on any site, if its interesting. I don’t remember ever searching for projects explicitly using Github search (I only use Google). A good project will show up anywhere.