That sounds very much like certain white trash family members in my family/extended family, and family of neighbor kids I grew up with.

Utterly shit people who have objectively fucked up or failed at nearly every opportunity ever presented to them, never seek out or attempt to create their own opportunities… but also somehow just infinitely smug and self confident about basically just random unremarkable nonsense details of their lives.

And of course, are never wrong about anything and are literally incapable of genuine introspection.