Why is there a problem? Vindictive? To what, sin? Of course. Cruel? To what? Imperfection? Of course. Angry? Over what? Evil? Of course. "Give her double the torment she gave you." "To hate evil -that is wisdom." Do you not understand that He would be wise in hating us? We are, after all, evil, right? We needed a Savior, right? We didn't earn it, right? That's why God making a way is referred to as mercy and grace. These are both things that acknowledge the unworthiness of the recipient, as in, it would be justified if He did not give it to us. "There is no one good, no, not one." Is God wrong in saying this? "Who has given to Me that I should repay him?" Is God wrong in saying this? "They have altogether become worthless." Is God wrong in saying this? "Unless you repent you will all perish." Is God wrong in saying this? "saving them from, in fact, God Himself." Yes. A righteous, holy, and justified God that doesn't exist for us, but us for Him, and we screwed it up, and He doesn't have to love us.
"What?! Doesn't have to love me?! GOD IS LOVE. HE HAS TO LOVE EVERYONE."
No. There is no Bible verse saying God has to love everyone or that God loves everyone the same or that God does nothing but love everyone or that when God loved people He continued to love the world to salvation. In fact, there is no real reason to believe that the love we consider to be love has anything to do with the character of God, seeing as the Bible teaches that in our flesh we are cut off from the Holy One and blinded to His face. "But the fruit of the Spirit is kindness! And God described Himself as kind." That doesn't mean He has to be kind. We don't deserve grace. We can't earn grace. We aren't worthy of grace. We will never be worthy of grace. He has chosen to be gracious. It isn't due from Him. If He was ever against us, it would be righteousness because He would be good for condemning us. He would be justified in tormenting us. He would be right in hating us. It would be love for Him, whatever He chooses to do because God is love. He isn't bound by a personal sense of propriety or any culture's judgment of His ways. We are evil. Forgive me if I am wrong, but that's why Jesus died on the cross, because we were evil. He made a way when there was no way to bring us to Himself. He is the One who makes us worthy. He is the One who withholds His righteous hand. And He was justified by the fall of Adam. And He was justified by our sins. In fact, all of His judgments are right. So when He creates you, or someone else, or Satan, and dooms them to an eternity of torment and pain, does He do it because He is cruel or because He is right? He is right. He is justified. He is holy and to be feared. Common Christianity has no reverence for God. But their lip service will not save them from the sins they have sown, that's the meaning of "daith without deeds is dead." Israel often thought that they could live as they pleased, ignorant of the laws of God, because they called themselves descendants of Abraham. But the promise was for his Seed, and his Seed is the Holy Spirit, and those who know God obey God.
But I would also that we remember the thief on the cross. It's not like he was worried about being baptized, understanding what TULIP stands for, or wondering whether or not he was going to be faithful in going to mass, and Jesus still saved him because in essence he was trusting in Jesus as his only way to God, regardless if what his understanding of the blood was, or whatever you want to say about it. So God works with us, but we must be careful because, "He who does not sow with me scatters." "Anyone who rejected the law of Moses died without mercy on the testimony of two or three witnesses. How much more severely do you think someone deserves to be punished who has trampled the Son of God underfoot, who has treated as an unholy thing the blood of the covenant that sanctified them, and who has insulted the Spirit of grace? For we know him who said, 'It is mine to avenge; I will repay,' and again, 'The Lord will judge his people.' It is a dreadful thing to fall into the hands of the living God."