The way Scotland's talent is spread out is extremely non-optimal for a small nation.
The ideal setup seems to be having a decent spread of average, hard-working players, and then one or two quality creative or attacking players. If you have no glaring weak spots, and can produce one or two moments of quality per game, you can do reasonably well.
Scotland have two elite left backs, several fairly good box-to-box midfielders, two promising but injured right backs, and a couple of decent centre backs. The rest of the squad is pretty much terrible.
We are stacked in a couple of positions, but they are positions that don't really win games.