“I can understand the referee giving the red card but we dind’t cope with the emotions of the occasion and we didn’t control ourselves well enough.”
Goals from Origi, Mamadou Sakho, sub Danil Sturridge and Philippe Coutinho piled the pressure on Martinez ahead of Saturday’s FA Cup semi-final against Manchester United which could prove his last game.
He added: “It was a horrible, horrible show. We didn’t do the basics right.
“We forgot to defend the box properly and we gave them a soft two-goal lead and then when you are trying to regroup we lost Gareth Barry at half-time through injury, then suffered the red card and then John stones was feeling ill with stomach cramps.
“It was one disaster after another.”