I'm a season ticket holder at Real Sociedad and have very good contacts within the club.
I followed closely Moyes when he was here for a year
The general consensus within the club and among the fans was that he was a complete and utter disaster on every possible level
He made no effort to learn anything about La Liga, the language, the city, didn't know who his own players were, often stubbornly playing players out of position because he mixed them up. He had a really dreadful relationship with his players and training staff. Even the office staff hated him!
Closed minded, unimaginative, arrogant, ignorant and lazy are some of the repeatable adjectives used to describe him
But far worse than all that was what the players and coaching staff thought all thought of his credentials as a trainer/coach. To sum up you won't find anyone at Real Sociedad who doesn't say "He hasn't got a clue" .Long balls, no creative tactics whatsoever, no player development - indeed there isn't a player at the club he didn't get worse under Moyes and who hasn't improved since Eusebio replaced him.
Apparently his match management was to set up defensively (but not effectively) and leave the attacking solutions to the imagination of the players - no creative tactics whatsoever
David Moyes as manager of West Ham would be a total and utter, unmitigated disaster
Please don't let it happen