2Pe 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
That's great verse. But have you considered what it really means?
You have made the mistake of thinking that "any" means any human being who has ever lived or whoever will live in the future. And you have made the mistake of thinking that "all" means everyone who has ever lived or whoever will live. If God intended to bring everyone to repentance, God is a massive failure. But, instead, the Bible teaches that God is infinite in power and in control of everything.
Who is Peter addressing? Christians. Who is the "us" in the verse? Christians. Who is God longsuffering toward? His elect. God is not willing that "any" of his elect should perish. He wants "all" His elect to "come to repentance." And since this repentance is a gift of God (Acts 11:18), God achieves what God desires. (He always does!)