Probably for the best. Our species hit its own wall, or "great filter", within the last generation. We will never go to the stars or colonize other planets. Our planet is probably the galactic Somalia at this point.
Honestly, aliens would be doing us a favor if they came and subjugated/ enslaved humanity. Take us as pets, maybe.
Aliens: "We have come and enslaved you! We've killed your leaders, and we will be in charge."
Us: "Oh thank god! Finally!"
Aliens: "Uh.. we'll use you as sex slaves and pets!"
Us: "It just keeps getting better!"