NoCritical Bug

Hi,
Can anyone tell me how it is possible to get critics off on a server? (a normal hit and a critical hit do the same damage) I have try to do $event->setModifier(0.0, EntityDamageEvent::MODIFIER_CRITICAL)); but the critics heal me..

My Code:

PHP:

/**
     * @param EntityDamageEvent $event
     */
    public function damageHandler(EntityDamageEvent $event)
    {
        $entity = $event->getEntity();
        if ($entity instanceof Player) {
            //if ($event instanceof EntityDamageByEntityEvent) {
                if ($entity->getLevel()->getFolderName() !== "fazioninew" and $entity->getLevel()->getFolderName() !== "teanther" and $entity->getLevel()->getFolderName() !== "ender") {
                    var_dump("Prima: " . $event->getModifier(EntityDamageEvent::MODIFIER_CRITICAL) . "\n");
                    //if ($event->getModifier(EntityDamageEvent::MODIFIER_CRITICAL) > 0)
                    $event->setModifier(0, EntityDamageEvent::MODIFIER_CRITICAL);
                    var_dump("Dopo: " . $event->getModifier(EntityDamageEvent::MODIFIER_CRITICAL) . "\n");
                }
            //}
            if (in_array($entity->getLevel()->getFolderName(), self::PROTECTION[$event->getCause()] ?? [])) {
                $event->setCancelled();
                if ($entity->getLevel()->getFolderName() == "spawn1") {
                    $entity->teleport($this->getServer()->getDefaultLevel()->getSafeSpawn());
                }
            }
            if ($entity->getLevel()->getFolderName() === "SumoFFA") {
                if ($event->getCause() === EntityDamageEvent::CAUSE_ENTITY_ATTACK) {
                    $entity->setHealth($entity->getMaxHealth());
                }
            }
            if (!$entity->hasPermission("thq.fly")) {
                if ($event instanceof EntityDamageByEntityEvent) {
                    $damager = $event->getDamager();
                    if ($damager instanceof Player and $entity->isFlying()) {
                        $entity->setAllowFlight(false);
                        $entity->setFlying(false);
                        $entity->sendMessage($this->getTranslatedMessage($entity, "no-pvp-fly"));
                        if ($damager->isFlying()) {
                            $damager->setAllowFlight(false);
                            $damager->setFlying(false);
                            $damager->sendMessage($this->getTranslatedMessage($damager, "no-pvp-fly"));
                        }
                        if ($event instanceof EntityDamageByChildEntityEvent) {
                            $child = $event->getChild();
                            if ($child instanceof Arrow) {
                                $entity->setAllowFlight(false);
                                $entity->setFlying(false);
                                $entity->sendMessage($this->getTranslatedMessage($damager, "no-pvp-fly"));
                                if ($damager->isFlying()) {
                                    $damager->setAllowFlight(false);
                                    $damager->setFlying(false);
                                    $damager->sendMessage($this->getTranslatedMessage($damager, "no-pvp-fly"));
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    /**
     * @param PlayerExhaustEvent $event
     */
    public function onHunger(PlayerExhaustEvent $event)
    {
        if ($event->getPlayer()->getLevel()->getFolderName() !== "fazioninew") { //era mercurio
            $event->setCancelled(true);
        }
    }

Thanks all.