Bring a large pot of salted water to a rolling boil and add the elbow macaroni. Cook it one minute less than the package instructions so it stays firm, since it'll keep cooking a little in the hot sauce later. Drain it in a colander and set it aside while you build the sauce.
Melt the butter in your saucepan over medium heat, then add all that minced garlic at once. Stir it constantly for about a minute until it turns fragrant and just barely golden. This step is the heart of the cursed flavor, so don't rush past it or let the garlic burn.
Sprinkle the flour directly into the garlic butter and whisk it in right away. Let this cook for about a minute so the raw flour taste disappears completely. You're looking for a thick, paste-like texture that clings to the whisk before you add any liquid.
Pour in the warm milk a little at a time, whisking constantly so no lumps form. Once it's fully incorporated, stir in the heavy cream and let the mixture come to a gentle simmer. It should thicken enough to coat the back of a spoon within a few minutes.
Lower the heat and add the cheddar, mozzarella, and cream cheese in small handfuls, stirring between additions. Keep the heat low here so the cheese melts smoothly instead of turning grainy. Season with the smoked paprika, hot sauce, salt, and pepper once everything is melted.
Fold the drained macaroni into the cheese sauce until every piece is coated. Let it sit off the heat for two minutes so the sauce thickens slightly and clings better. Garnish with chopped parsley right before you serve it warm.