This gets tiresome. Github is a lot more than a host for Git repositories. If you want to suggest that people use something else, you need to suggest a replacement that has the features people use Github for.
being a host for git repositories has never been its core competency. neither has its groupware offering.
does it even serve OSS well? a very interesting criteria is, "Have mature or adopted end-user-facing OSS recently merged a large PR from an unallied contributor?" The answer is overwhelming no. This is why there is so much innovation in this space.