"Se llegó a ser director." I see this one a lot. Every other verb of change takes se, so learners add it here too. Hacerse and llegar a ser both mean "became", and both are about a path you chose. The difference is the climb. Hacerse is the step: se hizo abogado, he became a lawyer. Llegar a ser is where you end up after years of work. Llegó a ser socio del bufete. = He worked his way up to partner at the firm. And it's the one that never takes se. Llegó, not se llegó.