autoeliminarse

Used in competitions and games for a contestant knocked out by their own mistake rather than an opponent's play, and more broadly for someone removing themselves from consideration or a process.

• El equipo se autoeliminó al fallar el último penal. — The team eliminated itself by missing the final penalty kick.
• Con ese comentario, prácticamente se autoeliminó del proceso de selección. — With that comment, he practically eliminated himself from the selection process.
• En este juego es fácil autoeliminarse por un solo error. — In this game it's easy to eliminate yourself with a single mistake.

Learners sometimes reach for it in a self-harm context, which is inappropriate and not how the word is normally used — autoeliminarse in everyday Spanish refers to competitions or processes, not personal safety.