Burnout is not proof you cared more.

Reaching burnout is not evidence of dedication and it is not a moral achievement. It is usually what happens when demands exceeded resources for too long, often for reasons that had nothing to do with you, and treating it as proof of commitment makes it harder to stop and harder to recover.

If you are near that point, drop the interpretation. Ask what has been asking too much and what could be put down, even temporarily. The answer is often more available than it feels.