Eh, gits porcelain is wildy successful for how 'bad' it is. There are a million attempts to 'fix' its porcelain, mostly related to somebody's wish to meet some arcane workflow...

But for standard development (and with some sort of gitflow) most people need only ten or so commands to operate an otherwise complex algorithm for diffing and merging code, compared to the inexorably complicated UIs which at best offer the basic ten and then usually ten more random local idioms, or at worst don't offer the basics and still have the extra complexity...and then offer to drop you to shell for anything else...