I said in Martinez’s first season that players will like his style of play, and fans will like his positivity, as long as he’s winning. It was always going to be a problem as soon as we started losing games, if he carried on saying how well we played, and that performance matters more than results, and number of passes and possession are the best indicator of performance level, when you’ve barely created a chance all game.
People will see straight through that nonsense, and prefer a bit of honesty and an acknowledgment of what needs improving, when things aren’t going well.
If he can actually work on player position and pressing when out of possession, knowing when not to over-commit players, and better game management when in a winning position, he could easily do well.
His FA cup win indicates he’s better suited to one-off performances, rather than season-long consistency. Also international football for half-decent teams is geared towards very easy qualifiers, followed by winnable groups, and then KO competition against a pot-luck opponent – all of which I think suits Martinez getting a good run.
His tendency to make a team defensively worse over time would concern me if I was a Belgian fan, but if the players are getting properly (defensively) coached at club level, it could be that they retain the defensive side which Martinez admittedly neglects, while taking on board his attacking strengths of wide overloads, and getting 2v1s etc