It's extremely difficult to unseat the leader with a superior product alone. Once sufficient traction is established, people will flock to where everyone else is, further cementing their position. It also requires monumental fumbles by the leader to actively push people away from the platform. Unfortunately for those who don't like GitHub, it's run by a company with limitless resources to pour into it, or to flatout buy out its competition. Microsoft has a lot of experience with this.

> I really liked source hut.

Sourcehut never has and likely never will be a serious competitor. Its UX and goals are entirely different, and it's directed towards a very niche audience unlike GH.