For example, with Mercurial, there's at least four different ways to do a rebase-ish thing: transplant, graft, rebase, and rebase (w/ evolve enabled). It's not obvious which a newbie should pick (rebase+evolve... I think?). Likewise, Mercurial has purge and strip which both delete commits in different ways. Git has multiple ways to do the same thing, but at least it's simple and consistent when you lift the hood.
Undoing any sort of rebase-ish operation in Mercurial also seems difficult and janky. It seems to take multiple steps, and involves unbundling some sort of patch file stored underneath your home directory. Whereas in git, you just update a pointer: `git reset --hard $BRANCH@{1}`. Git's reflog is such a fantastic safety net. Doing any sort of history rewriting in Mercurial feels very dangerous, in comparison.