I'm not saying they should be denied those things. There's a reason it's a tragedy they're in such a shit situation that likely results in their demise.
But taking what you want isn't the way to go about it, forcing people to live in such a way to make you happy, let alone all the misery that process would cause, isn't okay.
You're suffering from a growing population of Monsters that need humans? The answer is simple: Stop having children. Most Monsters are already highly infertile, yes? Many of them will have already come to terms with such a reality, it won't be a massive cultural shift to have something like that.
I'm not saying fall on your sword and live in misery. I'm saying enjoy the time you have in the places you have now, and graciously accept the twilight. If the thing you truly value is love and happiness, then you wouldn't want to try and spread corruption and all the things attached to it and make so many people so miserable, or so dead, physically or otherwise.
And if you refuse to do that, if you refuse to back down and continue to try and conquer humanity? Then I'm afraid you'd be treated like anyone else that takes what isn't theirs to take, or robs someone of their life or freedoms - the gallows. And nobody wants that.