Steam has a lot of issues but there are too just lots of areas where better products don't win out over inferior products, that's just not how the world works for lots of reasons.
Updating games on HDDs on Steam takes ages; I often see the download complete but then wait another 30 minutes for their diff to complete; and that happens with 10-20 games every week when they have big updates (10GB+). Just for this one thing I would switch elsewhere.