It’s not solved because it’s trash. There’s no good interface for it and people find it difficult to use.

Skill issue. It's the most popular VCS in the world by a huge margin, millions of devs use it every day just fine, countless forges have been built around it, and there's only one semi-compelling alternative frontend (jj). If you honestly find Git challenging, how are you coping with software engineering? Git is the easy part.