It was Conference league not EL. The best team they faced was Betis. EL has some very good teams, Conference barely has anyone.
CWC was his biggest achievement, but it is still a glorified friendly if we are being honest.
He got the expectations right tbf, but it isn't like he overachieved big time.
However, they have an awfully planned squad, no experience within the dressing room. They are more or less playing football manager but with the aim of profit rather than trophies. They seriously need an actual sporting direction. Maresca was their best bet tbh.
No big name coach should be touching this team, talent is there and with few additions they can be legit, however they aren't going to give it to anyone.
Yes, ECL I meant, only Betis true, but still a title Villa and Fiorentina failed to get.
It's not only the CWC, he showcased potential in many different ways
He delivered tactical masterclasses in most important games against big teams
Evidently, like Klopp first at Liverpool, like Arteta first at Arsenal, etc., you can't expect to win EPL the first 3 or 4 years. You build gradually: solidify top4, become title contender, then win it
Takes time, like all serious projects.
But there is not serious project with such owners. They can't get the basics of football right. They think they play fM as you say. Their delusion if infuriating.