Thommy H-H
Hero
It's not the set's fault you seemingly didn't tell your players what you wanted from them though, or expected them to do all the prep themselves when you - an experienced DM - had offered to run it for them. Like, if I knew a DM was showing up to run the game for me, I wouldn't be sitting there trying to work out how to play myself. It's quite possible they would have been able to do it fine without you, but why would they bother to try when you were arriving soon?I think they understood it, the set just wasn't made for people who may boardgame, but do not understand RPGs.
On top of that, every starter Set (basic sets or things like the Essentials Kit is different) I've played is a sit down and run type of game. Except for prepping the dungeon everyone already is ready to go the instant they get their character sheets. It is then (as I'm normally familiar enough with the sheets, they are not that different from the full character sheets of the game the set is for) a simple matter for me to explain it as I go rather than trying to tailor it to however the starter set has done things.
For a Starter Set, the entire reason to go with a Starter Set is ease of starting the game with new players. If it fails at that basic task...why use a Starter Set rather than something more complex in the first place (like the PHB???)
Sorry, it all just reads like you had a pretty crappy intro session due to a misunderstanding or miscommunication over expectations and you're trying to blame it on the product. How can you judge it as a tool for teaching new players when you ran it as an experienced player teaching newbies, but also didn't do any prep for that?