Spain are stronger than Turkey therefore it doesn't matter if they're second best in the group, when you face the best you'll be destroyed and that's what happened. Spain used them as an example for others that'll be coming to play them with the hopes of winning. Spain are demonstrating their dominance and I think they're among the favourites to win this world cup coming up. The Spain team is well balanced. They dominated the game and Turkey didn't stand a chance of winning. The defence of Spain is also very strong and their midfield too as most of the goals came from the midfield players. Merino got his hat trick and Pedri with a brace.
Spain beat Turkey too easily, but Turkey can play well against average teams, and it is difficult for them to play against favorites. Although I do not remember the last time they lost with such a crushing score in official games. They need to pay attention to defense, because conceding so many is unacceptable even against such a strong opponent. As for Spain, they showed that they are in excellent shape, and if the opponent allows them, they are ready to score as much as they want.