Loss: Manchester United 0, Atletico Madrid 2 in the Champions League.
Martinez posted on Instagram saying his anger reflected a desire for the club to win major trophies.
He called for greater financial investment and better recruitment by director of football Jason Wilcox.
He stressed that players must take responsibility and work together to improve.
United’s winless run is now five matches, putting pressure on the coach.
He expressed frustration, urging the club to invest more in player recruitment and emphasizing that the players must improve their performance.
Martinez also affirmed his belief in the coach and teammates, calling for collective ambition and commitment to return to the top.
The defeat extended United’s winless streak to five games, increasing scrutiny on head coach Michael Carrick.
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