It's totally possible there are many excellent people working at that company, but the boss is pure evil. It's pretty clear to you too that he's the one being disloyal, and a lot more than just that. He screwed you because he could, and he lied to you about it for months. Feel no loyalty to the guy.

That said, revenge can only hurt you. You need a job, and unless you have a legal case against him, there's nothing you can do about him right now. You need to think about you and your family, not about the shitty boss.